The Owner of a Car Wash Wants to See If

Multiple Choice

The owner of a car wash wants to see if the arrival rate of cars follows a Poisson distribution.In order to test the assumption of a Poisson distribution, a random sample of 150 ten-minute intervals was taken.You are given the following observed frequencies: ​ Calculate mean and use Poisson probabilities.The expected frequency of exactly 3 cars arriving in a 10-minute interval is

A) .1533.
B) .1743.
C) 23.
D) 26.145.