Problem $1$

OPER$3142024$ Spring Homework $2($NO submission$)$

Alpha Taxi and Hauling also plans to have cabs at a new rail station. The arrival process is a Poisson process and its expected arrival rate is $4\mathrm{.}8$ customers per hour, the service rate $($including return time to the rail station$)$ is expected to be $1\mathrm{.}5$ per hour and the coe$$cient of variation of the service times is $1.$ How many cabs will be needed to achieve an average time in line of $20$ minutes or less?