Main Entry: Bayes' theorem

Pronunciation: \ˈbāz-\

Function: noun

Etymology: Thomas Bayes †1761 English mathematician

Date: 1865

: a theorem about conditional probabilities: the probability that an event A occurs given that another event B has already occurred is equal to the probability that the event B occurs given that A has already occurred multiplied by the probability of occurrence of event A and divided by the probability of occurrence of event B