Question

3. What are complementary events?

A.They are two events in which either one or the other must happen, and they must happen at the same time
B. They are two events that happen at two different places.
C. They are two events in which either one or the other must happen, but they cannot happen at the same time.

Answer 1

The answer choice to the question is C!

Answer 2

It's answer is C.

They are two events in which either one or the other must happen, but they cannot happen at the same time.