Question

what is the sum of the probabilities of happening of an event & not happening of the event.

Answer 1

Sum of probabilities of happening of an event is equal to one or less than 1 ...
and probability of not happening of an event is equal to zero..
hope it helps u....

Answer 2

Sam of probabilities happening of the probability of happening an event ¬ happening of the even







Number of possible Outcome=









total number of favorable Outcome s=