The Manager of the Local Grocery Store Has Determined That

Multiple Choice

The manager of the local grocery store has determined that, on the 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 no more than 2 customers use the service desk?

A) 2381
B) 1465
C) 7619
D) 8535
E) 0916