(30.00 Puanlar)

3. City Cab, Inc., uses two dispatchers to handle requests for service and to dispatch the cabs. The telephone calls that are made to City Cab use a common telephone number. When both dispatchers are busy, the caller hears a busy signal; no waiting is allowed. Callers who receive a busy signal can call back later or call another cab service. Assume that the arrival of calls follows a Poison probability distribution, with a mean of 60 calls per hour, and that each dispatcher can handle a mean of 40 calls per hour.

If management wants no more than 5% of the callers to receive a busy signal, how many dispatchers should be used?

(30,00 Puaniar) 3. City Cab, Inc., uses two dispatchers to handle requests for service and to dispatch the cabs. The telephone calls that are made to City Cab use a common telephone number. When both dispatchers are busy, the caller hears a busy signal; no waiting is allowed. Callers who receive a busy signal can call back later or call another cab service. Assume that the arrival of calls follows a Poisson probability distribution, with a mean of 60 calls per hour, and that each dispatcher can handle a mean of 40 calls per hour. If management wants no more than 5% of the callers to receive a busy signal, how many dispatchers should be used