Sharp Discounts Wholesale Club has two service desks, one at each entrance of the sore. Customers arrive at each service desk at an average of one every six min. The service rate at each service desk is four mins per customer.
a. how often (what percentage of time) is each service desk idle?
b. what is the probability that both service clerks are busy?
c. what is the probability that both service clerks are idle?
d. how many customers, on average, are waiting in line in front of each service desk?
e. how much time does a customer spen d at the service desk (waiting plus service time)?