A Bank Is Designing a New Branch Office and Needs

Multiple Choice

A bank is designing a new branch office and needs to determine how much driveway space to allow for cars waiting for drive up teller service.The drive up service will have three tellers and a single waiting line.At another branch of the bank in a similar setting,the average service time for drive up tellers is 4 minutes per customer and average arrival rate is 36 customers per hour.It is expected that the new bank will have similar characteristics. What is the average time that a customer would have to wait in line before being served?

A) 4.3 minutes
B) 8.3 minutes
C) 2.7 minutes
D) 6.7 minutes
E) 8.3 minutes.