AP®︎ Statistics (pre-2026): Topic 4.6 Flashcards

Master key terms and definitions for Topic 4.6 of AP Statistics (pre-2026) – Independent Events and Unions of Events to help you prep for quizzes and the AP exam.

This course has been archived. The College Board updated AP Statistics for the 2026–27 school year, and the units and topics changed.
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Term

Independent Events

Definition

Two events where knowing one occurred does not change the other's probability.

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Independent Events
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Two events where knowing one occurred does not change the other's probability.

VAR-4.EVAR-4.E.1
Independence Conditions
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If events are independent, then P(A|B)=P(A), P(B|A)=P(B), and P(A ∩ B)=P(A)P(B).

VAR-4.EVAR-4.E.2
Union of Events
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The probability that event A or event B or both occurs, written P(A ∪ B).

VAR-4.EVAR-4.E.3
Addition Rule
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Add individual probabilities and subtract overlap: P(A ∪ B)=P(A)+P(B)-P(A ∩ B).

VAR-4.EVAR-4.E.4