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Bayes' theorem

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noun \ˈbāz-\

Definition of Bayes' theorem

  1. :  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



Origin of bayes' theorem

Thomas Bayes †1761 English mathematician


First Known Use: 1830


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