conditional probability

likelihood of the occurrence of an event taking into account the occurrence of another event

This article defines some terms which characterize probability distributions of two or more variables.Conditional probability is the probability of some event A, given the occurrence of some other event B. Conditional probability is written P(A|B), and is read "the probability of A, given B".Joint probability is the probability of two events in conjunction. That is, it is the probability of both events together. The joint probability of A and B is written or
See more at Wikipedia.org...

Noun
1. the probability that an event will occur given that oneor more other events have occurred
(synonym) contingent probability
(hypernym) probability, chance