If either event A or event B must occur, then events A and B are said to be
A) mutually exclusive.
B) statistically independent.
C) collectively exhaustive.
D) None of the above.

Question

Quizplus · Accepted Answer

If either event A or event B must occur, it means that there are no other events outside of A and B that could potentially occur. This is the definition of collectively exhaustive events – together they cover all possible outcomes. Mutually exclusive events cannot occur at the same time, and statistically independent events have no relationship in terms of their likelihood of occurring.

If Either Event a or Event B Must Occur, Then