Burger World is considering opening a drive-through window for customer service. Management estimates that customers will arrive at the rate of 15 per hour. The server who will staff the drive-up window can service customers at the rate of one every three minutes.

Assuming Poisson arrivals and exponential service, find:

40. Utilization of the teller

A) 45%

B) 55%

C) 65%

D) None of the above

41. Average number of customers in the waiting line

A) 2.25

B) 5.22

C) 2.00

D) None of the above

42. Average number of customers in the system

A) 1.00

B) 2.00

C) 3.00

D) 4.00

43. Average waiting time in the line (in minutes)

A) 7 minutes

B) 8 minutes

C) 9 minutes

D) None of the above

44. Average waiting time in the system, including service (in minutes)

A) 9 minutes

B) 10 minutes

C) 11 minutes

D) None of the above