THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING:
The number of accidents on a particular highway averages 4.4 per year.Assume that the number of accidents follows a Poisson distribution.
-What is the probability that there are more than three accidents next year?
A)0.389
B)0.440
C)0.512
D)0.641

Question

Quizplus · Accepted Answer

The probability of more than three accidents is found by subtracting the probability of three or fewer accidents from 1. Using the Poisson distribution formula, calculate the probabilities for 0, 1, 2, and 3 accidents, sum them, and subtract from 1. The result matches option D, indicating a 0.641 probability of having more than three accidents next year.