[Suppose] Spinneys Supermarket at Emaar Residence has three clerks (cashiers) serving customers. On average, 30 customers are being served by a clerk every 10 minute. For Spinneyss normal working period, customers arrive at the rate of 2 customers per minute. Assume arrivals follow the Poisson distribution and service times follow the exponential distribution.

What is the average time a customer spends in the waiting line

Select one:

a. 0.7789

b. 0.0046

c. 0.2638

d. 0.5528

What is the probability of 5 customers in the system:

Select one:

a. 0.0158

b. 0.0012

c. 0.1462

d. 0.0296

What are the arrival and service rates:

Select one:

a. = 3 customers per minute and = 3 customers per minutes

b. = 2 customers per minute and = 3 customers per minutes

c. = 3 customers per minute and = 2 customers per minutes

d. = 2 customers per minute and = 2 customers per minutes