conditional probability


noun

Statistics, Mathematics. the probability that an event will occur under the condition that another event occurs first: equal to the probability that both will occur divided by the probability that the first will occur.

Origin of conditional probability

First recorded in 1960–65

British Dictionary definitions for conditional probability

conditional probability

noun

statistics the probability of one event, A, occurring given that another, B, is already known to have occurred: written P (A|B) and equal to P (A and B)| P (B)