A Bank Manager Estimates That an Average of Two Customers

Multiple Choice

A bank manager estimates that an average of two customers enter the tellers' queue every five minutes. Assume that the number of customers that enter the tellers' queue is Poisson distributed. What is the probability that exactly three customers enter the queue in a randomly selected five-minute period?

A) 0.0902
B) 0.1804
C) 0.2240
D) 0.2707