Two events, A and B, are mutually exclusive and each has a nonzero probability. If event A is known to occur, the probability of the occurrence of event B is
A)one
B)any positive value
C)zero
D)any value between 0 to 1

Question

Quizplus · Accepted Answer

Mutual exclusivity means that A and B cannot happen at the same time. Therefore, if event A has occurred, it is impossible for event B to occur, so the probability of event B is zero.

Two Events, a and B, Are Mutually Exclusive and Each