Customers arrive at a bank according to a Poisson process wi

Customers arrive at a bank according to a Poisson process with rate A per hour. The bank lobby has enough space for ten customers. When the lobby is full. an incoming customer goes to another branch and is lost. The bank manager assigns one teller to customer service as long as the number of customers in the lobby is three or less, she assigns two tellers if the number is more than three but less than eight, and otherwise she assigns three tellers.

Solution