Statistics & Probability

Mutually exclusive

Two events that cannot both happen at the same time. P(A or B) = P(A) + P(B).

Definition

Examples: rolling a 3 OR a 5 on one die (mutually exclusive). Rolling an even OR a multiple of 3 (NOT mutually exclusive — 6 is both).

Used in these topics

Related terms

Independent events

Events where one occurring does not change the probability of the other. P(A and B) = P(A) × P(B).

Conditional probability

The probability of one event given that another has occurred. Written P(A | B).

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