To calculate the probability of the union of two mutually exclusive events A and B,

Multiple choice question.

we add the probability of A to the probability of B, and then subtract the (nonzero) probability of the intersection of A and B.

we add the probability of A to the probability of B, and then subtract the complement of B.

we add the probability of A to the probability of B, and then subtract the complement of A.

we add the probability of A to the probability of B.

we add the probability of A to the probability of B.

The correct answer is:

we add the probability of A to the probability of B.