If it has been determined that the probability of an earthquake occurring on a certain day in a certain area is 0.05, what are the odds against an earthquake?
A)18 to 1
B)1 to 20
C)19 to 1
D)20 to 1

Question

Quizplus · Accepted Answer

The probability of an earthquake occurring is 0.05, so the probability of it not occurring is 1 - 0.05 = 0.95. The odds against an earthquake are the ratio of the probability of it not occurring to the probability of it occurring, which is 0.95/0.05 = 19 to 1.

If It Has Been Determined That the Probability of an Earthquake