Introducing Variability $-$ Train Call Center

$2$ points possibk $($graded$)$

At a call center for train bookings the following information was collected:

Average processing time of a call, $p=360$ seconds

Utilization of the call center, $u=0\mathrm{.}6=60\%$

Variability Factor, $v=1\mathrm{.}105$

What is the awerage waiting time Tq in the queue?

$596\mathrm{.}7$ seconds

$150\mathrm{.}90$ seconds

$290\mathrm{.}22$ seconds

$109\mathrm{.}88$ seconds

What is the average time in the system, $Tq+p?$

$($Remember to convert from seconds to minutes!$)$

$18\mathrm{.}30$min

$15\mathrm{.}90$min

$20\mathrm{.}90$min

$10\mathrm{.}88$min