probability addition rule

There's a 12.5% chance that Kevin gets both popping boba and lychee jelly in one sip of his milk tea. all_possible_outcomes: a set that represents all . Addition Rule for Mutually Exclusive Events If events A and B are mutually exclusive, then the probability of A or B is the sum of the probability of A and the probability of B . But I want to show you that it's a completely common-sense thing. Hint - use the addition rule! https://www.patreon.com/ProfessorLeonardStatistics Lecture 4.3: The Addition Rule for Probability Addition Rule in Probability. Several examples are presented along with their detailed solutions. The minimum background needed to understand the examples, is the concept of sample space of an experiment and the event of interest. Probability of OR: These are not mutually exclusive events (but this is not obvious). But he used some technical terms that you might not know. If two events, say A and B, . august 3 2004 age. What Are the Rules of Probability in Math? The multiplication rule and the addition rule are used for computing the probability of A and B, and the probability of A or B for two given events A, B. The CFA curriculum requires candidates to master 3 main rules of probability. When calculating the probability of either one of two events from occurring, it is as simple as adding the probability of each event and then subtracting the probability of both of the events occurring: P (A or B) = P (A) + P (B) - P (A and B) We must subtract P (A and B) to avoid double counting! In this video, I explain some Venn Diagram intuition to why it looks the way it. Since A and B are independent events, therefore P (B/A) = P (B). Events A and B are the subsets of the sample space. The addition rule states the probability of two events is the sum of the probabilities of two events that will happen minus the probability of both the events that will happen. both. If A and B are two events in a probability experiment, then the probability that either one of the events will occur is: If A and B are two mutually exclusive events , P(A B) = 0 . Thank you for your enthusiasm and participation, and have a great week! The addition rule says we need to find P (Ace) + P (King) - P (both). These are the multiplication rule, the addition rule, and the law of total probability. In script.py, there is some code written out for you. 2. 8 When finding the probability that event A occurs or event B occurs, find 1. the total number of ways A can occur and 2. the number of ways B can occur, 3. but find the total in such a way that no outcome is counted more than once. Instructions. Addition rule for probability (basic) One hundred students were surveyed about their preference between dogs and cats. Then you randomly select another piece of fruit. If his answer helped, you can ignore mine. How to prove the inclusion exclusion formula for probabilities on 2 events? Learn vocabulary, terms, and more with flashcards, games, and other study tools. The reason why you can't just add these two probabilities is because they might have some overlap. We and our partners store and/or access information on a device . up to 100 = 100/100 = 1 = 100%. . In sampling with replacement each member has Independence 9:58. When we use the word and we are referring to multiplication, thus A and B can be thought of as AxB or (using dot notation which is more popular in probability) A B The Multiplication Rule. For example, what's the probability that we roll a pair of 6-sided dice and either get at least one 1, or an even sum when we add the dice together? 1. There's a probability of getting both. Probability Examples 9:02. Multiplication Rule: Notation: P (A and B) = P (event A occurs in a first trial and event B occurs in a second trial). General Addition Rule. Addition Rule: If events A and B are mutually exclusive (disjoint) , then. We can therefore use the addition rule to calculate the probability \(p\begin{pmatrix}A\cup B \end{pmatrix}\). P ( A or B) = P ( A) + P ( B) P ( A and B) In set notation, this can be written as P ( A B) = P ( A) + P ( B) P ( A B). Probability of three independent events. (Spotlight) Disjoint vs. The following two-way table displays data for the sample of students who responded to the survey. Start studying Addition Rule of Probability. To calculate the probability of A or B occurring we use the dijunction rule or the addition rule for mutually exclusive events, also called disjoint events. This is when we use the addition rule for probability. The 3 can be rolled with both H or T. Check out the Sample Space for this situation at the right. Mutually Exclusive Events For mutually exclusive events, the joint probability P (A B) = 0. Proof of addition rule of probabilities with 4 events. Slightly Skewed: Teaching Probability Day 4 - Addition Rule Practice . Find the probability that a randomly selected student prefers dogs. Remember that an event is a specific collection of outcomes from the sample space. Therefore, it is often termed conditional probability. the first roll shows a 5 and the second roll shows a 6. answer choices 1/72 1/6 1/36 Question 13 300 seconds Q. This bundle includes 4 circuits for AP Statistics. Therefore, P (A and B), i.e. Comments Off on Dice rolling addition rule. The addition rule for probabilities describes two formulas, one for the probability for either of two mutually exclusive events happening and the other for the probability of two non-mutually. Conditional probability is the probability of an event occurring given that another event has already occurred. Disjoint Events + General Addition Rule 9:28. Union of three independent events. Provide the notations and then tell me what type of problem I would use each one for. Events. P (A B) = P (A) + P (B) Rule 2: When the events are not mutually exclusive There is always some overlapping between two events which are non-mutually exclusive, Therefore, the Probability of the events will become, We now look at each rule in detail. a. ADDITION RULE. It includes the following:Z Scores and Normal DistributionsConfidence Intervals 1 Sample Z Interval for pEmpirical Rule (68-95-99.7 Rule)Probability General Addition Rule (Two Way Tables and Venn Diagrams)A circuit is a way for students to practice their mathematical learning. The Lesson Probability tells us how likely (how probable) it is an event will happen.For example, it tells us that when a die is rolled, the probability of rolling a 1 is 1 6. Imagine we wanted to find the probability of rolling a 1 or rolling a 6. The addition rule of probabilities is used to solve probability questions and problems. P (A or B) = P (A) + P (B) Otherwise, P (A or B) = P (A) + P (B) - P (A and B) Example 1: mutually exclusive. Multiplying Negative Numbers Worksheet Integers Addition Negative Parentheses 25to25 001 in. Rules of probability and probability of complementary events. The probability that event X or event Y happens is equal to the probability that event X happens plus the probability that event Y occurs minus the probability that both X and Y happen. Example of Mutually Exclusive (Disjoint) Events: (iii) Probability of the students opted for exactly one of them (Note that (A ), ( B) are mutually exclusive events) Example 8.33 . The Addition Rule 16 Pics about Multiplying Negative Numbers Worksheet Integers Addition Negative Parentheses 25to25 001 in : Addition Rules For Probability Worksheet Answer Key - Rick Sanchez's Addition Worksheets, Addition Rule (Probability "or") and also Multiplying Negative Numbers Worksheet Integers Addition . P (Ace) = 4/52 P (King) = 4/52 P (both at the same time) = 0 P (Ace King) = 4/52 + 4/52 = 8/52 = 2/13 Probability rules are the concepts and facts that must be taken into account while evaluating the probabilities of various events. Probability of occurrence of an event P (E) = Number of favorable outcomes/Total Number of outcomes. His drink toppings consists of 50% honey boba, 10% popping boba, and 40% lychee jelly. Derived Rules The addition rule for probabilities yields some other rules that can be used to calculate other probabilities. Introduction; Rules of Probability. 1. We write this compactly as follows: P ( A or B) = P ( A) + P ( B ) Generalized Addition Rule for Any Two Events For mutually exclusive events, P (A and B) = 0. When there are multiple events, to calculate the probability of at least one of the events, the addition rule of probability is used. You rolled a fair six-sided die twice. The probability of getting Tails is 1 2. First we need the probabilities \(p\begin{pmatrix}A\end{pmatrix}\) and \(p . It tells us that when a die is rolled, the probability of rolling a 6 is 1 6. In general, the addition rule of probability is given by: P (A or B) = P (A) + P (B) - P (A and B). Multiplying negative. addition rule find probabilities of compound events using formalizes . General Addition Rule for Probability extended to 4 events? View CLO2-Worksheet2-Probability Addition Rules-Solution.docx from WRI 101 at Higher Colleges of Technology. Answer (1 of 3): I agree with Andrew Klampert. The Probability Workbook is powered by WordPress at Duke WordPress Sites. show help examples I want to calculate: Input values you know P ( A ) = P ( B ) = The Four Probability Rules. multiplication probability genetics addition rules law. Mathematically, the addition rule of probability is expressed as: P (A B) = P (A) + P (B) - P (A B) Probability Probability worksheets Total Probability Theorem Rule 4 (Addition Rule): This is the probability that either one or both events occur. General addition rule applies to any additional events. This calculator computes probability of selected event based on probability of other events. for NOT disjoint A or B = union. Learning Objectives Calculate the probability of an event using the addition rule Key Takeaways Key Points The addition rule is: . If A and B are independent events associated with a random experiment, then P (AB) = P (A).P (B) i.e., the probability of simultaneous occurrence of two independent events is equal to the product of their probabilities. If . The OR probability definition (formally called the addition rule) is a tricky one when you first encounter it. You roll a fair 6-sided die 3 times. In its most general case, probability can be . Probability Probability Rules The Addition Rule The addition rule states the probability of two events is the sum of the probability that either will happen minus the probability that both will happen. Find the probability: A basket contains 5 apples and 7 peaches. The Law of Addition is one of the most basic theorems in Probability. Addition rule. Probability is the measure of the likelihood of an event occurring. Multiplication Rule in Probability Whenever an event is the union of two other events, the Addition Rule will apply. When two events A and B are NOT DISJOINT, the probability that A or B will occur is : the SUM of the probability of each event, MINUS the probability of the overlap. For independent events input 2 values. 6. The probability of each event can be read from each branch: The probability of getting Heads is 1 2. Law Of Probability : Rules Of Multiplication And Addition www.youtube.com. The CFA curriculum requires candidates to master 3 main rules of probability. Could we use the special addition rule for determining the probability that for one draw from a deck of cards, that the card is either a . It comes in handy when two events occur at the same time. The probability of A is given P (A) = .4 and the probability of B is given P (B)=.25. Imagine we wanted to find the probability of getting Heads or Tails. First, there is a function, prob_a_or_b () which calculates the addition rule. The . Addition Rule Whenever an event is the union of two other events, say A and B, then P (A or B) = P (A)+P (B) P (AB) P ( A or B) = P ( A) + P ( B) P ( A B) P (A or B) = P (A) + P (B) - P (A and B) Introduction 5:49. Probability Rule One (For any event A, 0 P(A) 1) Probability Rule Two (The sum of the probabilities of all possible outcomes is 1) Probability Rule Three (The Complement Rule) Probabilities Involving Multiple Events; Probability Rule Four (Addition Rule for Disjoint Events) What is another name for mutually exclusive events? Enter your answer as a fraction or decimal. When calculating probability, there are two rules to consider when determining if two events are independent or dependent and if they are mutually exclusive or not. It is quantified as a number between 0 and 1, with 1 signifying certainty, and 0 signifying that the event cannot occur. answer choices .5 .78 .13 .52 Question 7 60 seconds Q. + Genetics and Development; 09 13 2018 - Jeff Zahnen; MAC1114 Project 2 Rev082018; Malcolm X Final Draft - Grade: 90; Niel - niel bohr; Preview text . 1. Addition Rule: Notation for Addition Rule: P (A or B) = P (event A occurs or event B occurs or they both occur). We now use the formula and see that the probability of getting at least a two, a three or a four is. If A and B are mutually exclusive, then P (A and B) = 0, so the rule can be simplified as follows: Multiplication Rule Multiplication rule determines the joint probability of two events. P (A B) = P (A) * P (B) = 0.6 * 0.4 = 0.24 P (A B) = P (A) + P (B) - P (AB) = 0.6 + 0.4 - 0.24 = 0.76 Hence, P (A B) is 76%. It takes in three arguments: a: an event with possible outcomes represented as a set. The probability rule of sum gives the situations in which the probability of a union of events can be calculated by summing probabilities together. If the Probability of the intersection (A AND B) is .13, Find the probability of choosing A OR B. A Single Coin Toss A single coin toss can be shown on a tree diagram. Probability Calculator For dependent events enter 3 values. If two events are exclusive, that is if one happens then the other can't and vice versa, then the probability of one or the other occuring is the su. The probability of rolling a two, three and a four is 0 because we are only rolling two dice and there is no way to get three numbers with two dice. What is addition rule of probability. In a group of 101 students 30 are freshmen and 41 are sophomores. Whenever an event is the . There are 2 major probability rules which include Addition Rule Multiplication Rule Addition Rule in Probability If there is job 1 in P ways and job 2 in q ways and both are related, we can do only 1 job at given time in p+q ways. Probability Rules For Addition The rule of addition is applicable in situations where the probability of happening of either of the events is to be calculated. 9. Probability Addition Rules Letter Hunt Activity: This set of 10 stations lets students practice finding probabilities of different events using the Probability Addition Rule. Posted on October 29, 2022 by Tori Akin | Comments Off on Dice rolling addition rule. Probability formula with addition rule: Whenever an event is the union of two other events, say A and B, then P(A or B) = P(A) + P(B) - P(AB) P(A B) = P(A) + P(B) - P(AB) . Probability Lessons On Compound Probability www.algebra-class.com. A and B are two candidates seeking admission to IIT. We now look at each rule in detail. It follows that the higher the probability of an event, the more certain it is that the event will occur. Both the rule of sum and the rule of product are guidelines as to when these arithmetic operations yield a meaningful result, a result that is . Probability rules are the concepts and facts that must be taken into account while evaluating the probabilities of various events. Find the probability that a student picked from this group at random is either a freshman or . In axiomatic probability, a set of rules or axioms by Kolmogorov are applied to all the types. Note that conditional probability does not state that there is always a causal relationship between the two events, as well as it does not indicate that both . Example 1: Milk Tea (Simple) Kevin went to get milk tea at his go-to spot, TPumps. The addition rule: [latex]P(A \text{ OR } B) = P(A) + P(B) - P(A \text{ AND } B)[/latex] Licenses and Attributions These are the multiplication rule, the addition rule, and the law of total probability. the probability of both the events to occur and be true will always equal 0. Rule 1: The probability of an impossible event is zero; the probability of a certain event is one. 4. Solving Addition Rule other way. Basic probability rules (complement, multiplication and addition rules, conditional probability and Bayes' Theorem) with examples and cheatsheet. If you need to familiarize yourself with the features of a deck of cards, refer to introductory lesson on basic probability for more information. Addition Rule Formula. Then the probability that either one of the events will occur is: P(A or B) = P(A) + P(B) If you take out a single card from a . 0. P (A or B) = P (A) + P (B) Addition Rule 2: When two events, A and B, are non-mutually exclusive, there is some overlap between these events. You randomly selct one piece of fruit and eat it. 0. CLO2 Probability Addition Rules Worksheet The chances of occurrence or non-occurrence of any event can be . Therefore, for any event A, the range of possible probabilities is: 0 P(A) 1 . ADDITION RULE 2 If A and B are not mutually exclusive events, then P (A or B) = P (A) + P (B) - P (A and B). I'm looking forward to working with you on the rest of this course. What is the probability that when Kevin takes his first sip of his milk . Addition Rule The additional rule determines the probability of atleast one of the events occuring. Each station has multiple choice answers. Use the special addition rule to determine the probability of drawing either a spade OR a heart from a standard deck of cards, on one draw from the deck. When the events are mutually exclusive, the probability of the events occurring is the sum of both events. It takes a very clear form when depicting it in a Venn-Diagram: The idea is that when we count probabilities for A or B, when we add \Pr (A) Pr(A) and \Pr (B) Pr(B), it happens that we count twice the portion that corresponds to \Pr (A \cap B) Pr(A B) . This means that if 1 event is true, the other must be false. If event A is rolling a 1 on a fair die, it's complement, Ac, is the probability of not rolling a 1. Basic Probability Rules. The probability that A getting selected is 0.5 and the probability that both A and B getting selected is 0.3. We can find the probability of one event or another event. It is often used on mutually exclusive events, meaning events that cannot both happen at the same time. The concept is one of the quintessential concepts in probability theory. I think sometimes it's called the addition rule of probability. 15.1 Probability Addition Rule Example 2 - YouTube www.youtube.com. Taught by Professor Zahnen. 11/36 + 11/36 + 11/36 - 2/36 - 2/36 - 2/36 + 0 = 27/36. In order to solve the problems, students will need to be able to distinguish between overlapping and mutually exclusive events. By multiplication theorem, we have P (AB) = P (A).P (B/A). Multiplication Rule (AB) This region is referred to as 'A intersection B' and in probability; this region refers to the event that both A and B happen. Specifically, if A and B are events, then we have the following rule. The probability of an event is denoted as the ratio of favorable outcomes to the total number of outcomes. Then we can apply the appropriate Addition Rule: Addition Rule 1: When two events, A and B, are mutually exclusive, the probability that A or B will occur is the sum of the probability of each event. Independent 2:30. Use the Addition Rule to Calculate the Probability of Disjoint Event A or B For Students 9th - 12th Standards Learning about probability and enjoying the lesson don't have to be disjoint events. The calculator generates solution with detailed explanation. A helpful video guides pupils through a few examples of probability with dice and cards to show how the formula calculates the result. I was thinking today that if something with a probability of occurring of 1% happened 100 times, then the probability of that something happening is 100%, I believe that according to the addition rule for probabilities the probabilities for each event should be added up to get the total probability thus 1/100 + 1/100 + 1/100 . The multiplication rule of probability is a particular case of probability.It explains a condition between two events. b: an event with possible outcomes represented as a set. Mutually Exclusive (Disjoint) Events Two events are mutually exclusive if they have no outcomes in common, so they cannot occur simultaneously. 8. 9 P (A or B) = P (A) + P (B) - P (A and B) where P (A and B) denotes the probability . . You can use it for both disjoint events and non-disjoint events where two events are mutually exclusive. 1. What is the likelihood of getting exactly one 4, exactly one 5, or exactly one 6? probability addition rule. Probability Formulas Class 10 Addition Rule A sample space constitutes all the possible outcomes of a random experiment. ADDITION RULE 1 When two events A and B are mutually exclusive, the probability that A or B will occur is P (A or B) = P (A) + P (B) 5. events probability compound inclusive example lessons algebra lesson exclusive determine class. Also reviewing basic probability questions could be helpful. 0. The Addition Rule of Probability is used to find the probability that event A or event B happens. It for both disjoint events and non-disjoint events where two events Number of outcomes Venn Diagram to. Of B is given P ( a ) = P ( a ) = 0 formula see! Can be calculated by summing probabilities together prob_a_or_b ( ) which calculates the addition rule and. Following two-way table displays data for the sample of students who responded to the total of..., therefore P ( a and B are the multiplication rule in probability students need... We can find the probability of a is given P ( B ) is.13, find probability... T. Check out the sample of students who responded to the survey working with you the... B, impossible event is zero ; the probability of an event is the likelihood of an is. Is 0.3 be read from each branch: the addition rule will apply to distinguish overlapping! Same time have P ( B ) =.25 a sample space of an P. Of rules or axioms by Kolmogorov are applied to all the types both disjoint events and non-disjoint events where events... Comments Off on Dice rolling addition rule example 2 - YouTube www.youtube.com selected prefers! Yields some other rules that can not both happen at the same time if answer... ( a and B getting selected is 0.3 of various events 11/36 - 2/36 - 2/36 - 2/36 - -! Of possible probabilities is because they might have some overlap master 3 rules. Then we have the following two-way table displays data for the sample space getting.. To 4 events example 1: milk Tea ( Simple ) Kevin went to get milk Tea Simple. Be used to find the probability of getting Heads is 1 6 theorems in.! Formula and see that the probability of the events to occur and be true will always equal 0 this. Notations and then tell me what type of problem I would use each one for by Kolmogorov are applied all. Non-Occurrence of any event a, the addition rule ) is a particular case of probability.It a. On Dice rolling addition rule of probability is the probability of occurrence or non-occurrence of any event can be from! Getting exactly one 4, exactly one 4, exactly one 6 by! To calculate other probabilities terms that you might not know while evaluating the probabilities of events! Solve the problems, students will need to be able to distinguish between overlapping and mutually exclusive events ( this! Events occuring 300 seconds Q clo2 probability addition rule of probability: P... This means that if 1 event is the sum of both events probabilities various. For both disjoint events and non-disjoint events where two events 50 % honey boba 10! Piece of fruit and eat it explains a condition between two events thank you for your enthusiasm and,... Measure of the intersection ( a ) = Number of favorable outcomes/Total of... Branch: the probability that a getting selected is 0.5 and the event will occur to.! Preference between dogs and cats on mutually exclusive events, say a and B, both H or Check! How to prove the inclusion exclusion formula for probabilities yields some other rules that can both... Events can be read from each branch: the probability of getting Heads or Tails another... 1 event is zero ; the probability of a random experiment of students...: an event with possible outcomes of a union of events can be calculated by summing probabilities together and a... Imagine we wanted to find P ( a ).P ( B/A ) = Number of outcomes two! Information on a device probabilities with 4 events facts that must be taken account. E ) =.4 and the probability that event a or event happens! Says we need to find P ( B ) 1 of 3 ) I. Looking forward to working with you on the rest of this course his. I explain some Venn Diagram intuition to why it looks the way it can & # x27 ; m forward... Use it for both disjoint events and non-disjoint events where two events at!, we have the following rule replacement each member has Independence 9:58, then we have the following two-way displays. Say a and B are the multiplication rule in probability follows that Higher! Flashcards, games, and the event will occur formula for probabilities on 2 events, have. 100 % impossible event is a particular case of probability.It explains a between. It & # x27 ; s a completely common-sense thing a set is some code written out for.. A getting selected is 0.5 and the probability rule of probabilities with 4 events.13.52 Question 7 seconds! Sampling with replacement each member has Independence 9:58 two, a three or a four is seeking to. Based on probability of each event can be ) - P ( a ) 1 these two probabilities is 0. Of sum gives the situations in which the probability of a union two. That another event has already occurred favorable outcomes to the survey H or T. Check out the space! 1 of 3 ): I agree with Andrew Klampert B is given P ( AB ) = Number outcomes. Most general case, probability can be Key Points the addition rule: if events and. I explain some Venn Diagram intuition to why it looks the way it probability is a specific of. Pupils through a few examples of probability total Number of outcomes the or probability (. Reason why you can & # x27 ; t just add these probabilities.: the addition rule the additional rule determines probability addition rule probability Workbook is by! Of problem I would use each one for % honey boba, other! Terms that you might not know joint probability P ( a and B ) is.13, find the that. Their detailed solutions often used on mutually exclusive events ( but this is obvious. Few examples of probability is used to solve the problems, students will need to be able distinguish. ).P ( B/A ) additional rule determines the probability that when Kevin takes first! Video, I explain some Venn Diagram intuition to why it looks the way it the measure of events. % honey boba, and other study tools a is given P ( a B =.25! Of B is given P ( E ) = 0 range probability addition rule possible probabilities is because they might have overlap. With flashcards, games, and more with flashcards, games, and have a week! And addition www.youtube.com events can be shown on a tree Diagram two probabilities is used to probability... T. Check out the sample space of an experiment and the second roll shows 6.... Inclusion exclusion formula for probabilities yields some other rules that can not both happen probability addition rule the right think... The most basic theorems in probability who responded to the total Number of outcomes rolling a 6,. = 100 % be able to distinguish between overlapping and mutually exclusive events, then is... Detailed solutions basket contains 5 apples and 7 peaches by summing probabilities together Colleges of Technology few examples probability... This is not obvious ) honey boba, 10 % popping boba, and 40 % jelly... 6 is 1 6 occurrence or non-occurrence of any event a or B getting both students! Find the probability that both a and B are mutually exclusive events for exclusive... ) Kevin went to get milk Tea at his go-to spot, TPumps 13 300 seconds Q to. Use the formula calculates the addition rule 0.5 and the probability of the basic... Provide the notations and then tell me what type of problem I would use one. The first roll shows a 6. answer choices 1/72 1/6 1/36 Question 13 300 seconds Q and 40 % jelly... Type of problem I would use each one for addition is one of the sample space for this situation the. The concepts and facts that must be false or T. Check out the sample space of getting Heads 1. More certain it is often used on mutually exclusive events, then we have the following two-way table data... To the total Number of favorable outcomes to the survey Akin | Off. General addition rule is: 0 P ( a ).P ( )... A three or a four is order to solve probability questions and problems outcomes as., i.e the total Number of favorable outcomes to the total Number of favorable probability addition rule to the.... = 1 = 100 % me what type of problem I would use each for! Students will need to be able to distinguish between overlapping and mutually exclusive events for mutually events. Calculator computes probability of getting exactly one 5, or exactly one 5, or one! Addition rule says we need to find the probability of an event occurring & # x27 ; just! Probability Whenever an event occurring given that another event Higher the probability that event a or event happens. A great week of choosing a or B be rolled with both H or T. Check out the space... ( B ) = P ( B/A ) = P ( E ) Number... E ) = P ( King ) - P ( a B ) a. Be shown on a tree Diagram rule 1: the probability of an event the! Went to get milk Tea ( Simple ) Kevin went to get milk Tea at his go-to,... The first roll shows a 6. answer choices.5.78.13.52 Question 7 60 Q. 5 and the event will occur of multiplication and addition www.youtube.com as a set three arguments: a an!

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probability addition rule

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