Customers Arrive at a Ticket Counter at the Rate of 50

Multiple Choice

Customers arrive at a ticket counter at the rate of 50 customers per hour, according to a Poisson distribution. There are three ticket agents. Customers select the first available agent from one line. Each agent can process 20 customers per hour with exponential service times.
-Use the information in Scenario C.4.What is the average number of customers waiting in line for service?

A) Fewer than or equal to four
B) Greater than four but fewer than or equal to 4.5
C) Greater than 4.5 but fewer than or equal to five
D) Greater than five