The manager of the local grocery store has determined that, on average, 4 customers use the service desk every half-hour. Assume that the number of customers using the service desk has a Poisson distribution. What is the probability that during a randomly selected half-hour period, exactly 2 customers use the service desk?
A) .1483
B) .0916
C) .1465
D) .9084
E) .7619

Question

Quizplus · Accepted Answer

P(2) = e⁻⁴(4)²/2! (e = 2.71828)

The Manager of the Local Grocery Store Has Determined That