A Trucking Firm Has Five Trucks That Each Requires Service

Multiple Choice

A trucking firm has five trucks that each requires service at an average rate of once every 50 hours, according to an exponential distribution. The firm has a mechanic who needs five hours to complete the average job with exponential service times.
-Use the information in Scenario C.5.What is the average number of trucks waiting for service?

A) Fewer than or equal to 0.10
B) Greater than 0.10 but fewer than or equal to 0.14
C) Greater than 0.14 but fewer than or equal to 0.18
D) Greater than 0.18