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 basis

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 19 minutes to give a haircut, with an exponential distribution. While customers will have exponential interarrival times, with an arrival rate of 3.5 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 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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