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conditional probability

conditional probability Conditional probability is the chance that one event happens when it is already known that another event has happened.

Conditional probability is the chance that one event happens when it is already known that another event has happened. It is written as P(A|B), meaning the probability of A given B.

Also see

Sources

Drafting source: Online Statistics Education, version 2 (David M. Lane, project leader). Version 2; publisher statement snapshot 2026-10-18; SHA-256 0dcad9ee85f61f9e2bb24d26279de155ac749164ea4da2a3bffeabcf9ea471a6. “Conditional Probability” (conditional_p.html).
public-domain-US · Definition uses new wording; original source retains its stated licence. · Source snapshot SHA-256: a0854dcddadc46908c10794abec9b1353972451c4baf90d9466c8e585dda4e41

These citations identify the drafting sources. 2/2 independent reader passes against the pinned source packet. The drafter does not count as a reader. Source institutions do not endorse this dictionary.

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PsychTerms (psychterms.org), CC BY 4.0, version 1. “conditional probability.” Development preview.

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