Question

P is the probability of a certain event. Which of the following indicates that P is certain to happen?

A.P=0
B.P=1/2
C.P=1
D.P=100

Answer 1

The probability of the occurrence of an event ranges only from 0 to 1. Thus, eliminating the fourth choice, P = 100. If an event is not bound to happen, P = 0. If there are circumstances that may hinder it to happen, the probability is somewhere between the extremes. Lastly, if it certain to happen, the probability is 1. Therefore, the answer is letter C.

Answer 2

Note for probability, if it will never happen the P = 0. If it must happen P = 1.

So certain to happen:

C. P=1