If two equally likely events A and B are mutually exclusive and collectively exhaustive,what is the probability that event A occurs?
A)0.
B)0.50.
C)1.00.
D)Cannot be determined from the information given.

Question

Quizplus · Accepted Answer

If the events A and B are mutually exclusive, it means that they cannot happen at the same time. If they are collectively exhaustive, it means that one of them must happen. Since they are equally likely, the probability of each is 0.5. Therefore, the probability of event A occurring is 0.5.

If Two Equally Likely Events a and B Are Mutually