AP®︎ Statistics (pre-2026): Topic 4.5 Flashcards

Master key terms and definitions for Topic 4.5 of AP Statistics (pre-2026) – Conditional Probability to help you prep for quizzes and the AP exam.

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Term

General Multiplication Rule

Definition

The probability of both events occurring equals P(A ∩ B) = P(A) · P(B|A).

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General Multiplication Rule
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The probability of both events occurring equals P(A ∩ B) = P(A) · P(B|A).

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Joint Probability / Intersection
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The probability that two events happen together, written as P(A ∩ B).

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Given
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A cue word indicating a conditional probability, meaning the sample space is restricted to the stated condition.

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Two-Way Table
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A table of counts or proportions for two categorical variables, useful for finding joint and conditional probabilities.

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Venn Diagram
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A set diagram using overlapping regions to show events, intersections, and conditional relationships.

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Tree Diagram
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A branching diagram for multistage chance processes, where branch probabilities are often conditional probabilities.

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Conditional Probability
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The probability of event A given event B is P(A|B)=P(A∩B)/P(B).

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