conditional probability

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English[edit]

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Noun[edit]

conditional probability (plural conditional probabilities)

  1. The probability that an event will take place given the restrictive assumption that another event has taken place, or that a combination of other events has taken place. (Mathematically, the definition would be that the conditional probability of B given A is equal to the joint probability of A and B divided by the probability of A.)

Usage notes[edit]

  • The "probability of event B given event A" can be represented symbolically as P(B|A).
  • The "probability of event B given events A and C" can be represented symbolically as P(B|A,C).

See also[edit]