Problem:
Discounts Wholesale Club has two service desks, one at each entrance of the store. Customers arrive at each service desk at an average of one every six minutes. The service time at each service desk is four minutes per customer.
Required:
Question 1) What is the probability that both service clerks are busy? (Round your answer to 4 decimal places.)
Question 2) What is the probability that both service clerks are idle?
Solve the given numerical problem and illustrate step by step calculation.