Question: Benny the Barber is considering opening a second location, this time with two chairs . Customers would be selected for a haircut on a FCFS

Benny the Barber is considering opening a second location, this time with two chairs.

Customers would be selected for a haircut on a FCFS basis from those waiting.

Benny has estimated that each barber would take an average of 17 minutes to give a haircut, with an exponential distribution. While customers will have exponential interarrival times, with an arrival rate of 3.8 per hour.

Find the following:

1. The average number of customers waiting. Please keep 4 decimals.

2. The average time a customer waits (in minutes). Please keep 4 decimals.

3. The total average time a customer is in the shop (in minutes). Please keep 4 decimals.

4. Which notation do we use to describe this queuing model?

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