Scenario B.4 Customers Arrive at an Airline Ticket Counter at the Rate

Multiple Choice

Scenario B.4
Customers arrive at an airline 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 B.4. What is the average number of customers waiting in line for service?

A) fewer than or equal to 4.0
B) greater than 4.0 but fewer than or equal to 4.5
C) greater than 4.5 but fewer than or equal to 5.0
D) greater than 5.0