DUESTION & and $9(0\mathrm{.}6$m each$)$: A bank has opened a new loan service for individa the vate of one everg

minussine takes $10$ minutes per customer. n svorane Customers ative a the bank at the acted by very $12$

minutes. Customer arrival eaters slamer on average distribution and the service time is described by an exponential distribution $($Model of single channel, exponential service time$).$

A$.4\mathrm{.}17$

Question $8$: The average number of customers wait in queue is:

B$.3\mathrm{.}2$

C$.5$

D$.$ None of them above

$1,40$

Question $9$: The average time customers spend in a bank is: $($minutes$)$

B$.50$

C$.60$

D$.$ None of them above