A conditional probability P(B|A)is equal to its marginal probability P(B)if
A)it is a joint probability.
B)statistical dependence exists.
C)statistical independence exists.
D)the events are mutually exclusive.

Question

Quizplus · Accepted Answer

If statistical independence exists, it means that the occurrence of event A does not affect the probability of event B, in which case P(B|A) = P(B). So the marginal probability of B is equal to its conditional probability given A if and only if A and B are statistically independent.

A Conditional Probability P(B|A)is Equal to Its Marginal Probability P(B)if