Question $14$

What is the average number of customers waiting in line before being served?

Question $15$

What is the average number of customers in the barber shop including those that are waiting in line

and those receiving service?

Question $16$

What is the average number of customers in service?$($Q$11-$ Q$16)$ SLC Barber Shop

A new customer walks into SLC Barber Shop every $60$ minutes on average, with a standard deviation

of the interarrival times being $60$ minutes. At SLC Barber Shop, the average service time is $30$

minutes, with a standard deviation of service times being $45$ minutes.