Question: Queueing: multi-server queues A small town with one hospital has two ambulances to supply ambulance service. Requests for ambulances during non-holiday weekends average 0.45 per

Queueing: multi-server queues

A small town with one hospital has two ambulances to supply ambulance service. Requests for ambulances during non-holiday weekends average 0.45 per hour and the rate is Poisson-distributed. Ambulance travel and assistance time averages two hours per call and follows an exponential distribution. Determine:

The average number of customers waiting for an ambulance.
The average time of customer waiting for an ambulance.
The probability that both ambulances will be busy when a call comes in.
The probability that a call has to wait for an ambulance to come for more than 20 minutes.

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