Question $16$

$0\mathrm{.}25$ pts

A small barber shop has a single chair and an area of waiting, where only one person can be in the chair at a time, and no one leaves without getting their hair cut. So$,$ the system is roughly:

Entrance $->$ Wait $$ Haircut $->$ Exit

Assume on average the barber shop can serve $10$ customers per hour and each customer stays an average of $0\mathrm{.}5$ hour for the service. Applying the Little's Law, what is the average number of customers in the barber shop?

$10$

$3$

$15$

$5$