Cars arrive at a service station according to Poisson’s distribution with a mean rate of 5 per hour. The service time per car is exponential with a mean of 10 minutes. At steady state, the average waiting time in the queue is

Cars arrive at a service station according to Poisson’s distribution

1.	Cars arrive at a service station according to Poisson’s distribution with a mean rate of 5 per hour. The service time per car is exponential with a mean of 10 minutes. At steady state, the average waiting time in the queue is
A.	10 minutes
B.	20 minutes
C.	25 minutes
D.	50 minutes
Answer» E.