Concerning the problem below, I understand that one event must occur to have collectively exhaustive event. I don't understand how to determine the problem as stated.
If two events are collectively exhaustive, what is the probability that
both occur at the same time?
a. 0
b. 0.50
c. 1.00
d. Can't be determined from the information given
The solution gives probability of joint occurance of collectively exhaustive event.