When the odds against an event occurring are 9 to 1, the probability that the event will occur is .10.

Question

Quizplus · Accepted Answer

The odds against an event occurring are given as the ratio of the probability of the event not occurring to the probability of the event occurring. If the odds against an event are 9 to 1, this means that for every 1 time the event occurs, it does not occur 9 times. Therefore, the probability of the event occurring is 1/(9+1) = 1/10 = 0.10.

When the Odds Against an Event Occurring Are 9 to 1