A self-service store employs one cashier at its counter. 8 customers arrive on an average every 5 minutes, whereas cashier can serve 10 customers in same time. Assuming Poisson distribution for service rate, the average time a customer spends in the queue will be

A self-service store employs one cashier at its counter. 8 customers a

1.	A self-service store employs one cashier at its counter. 8 customers arrive on an average every 5 minutes, whereas cashier can serve 10 customers in same time. Assuming Poisson distribution for service rate, the average time a customer spends in the queue will be
A.	4 minutes
B.	3 minutes
C.	2 minutes
D.	1 minute
Answer» D. 1 minute