Question Completion Status:

Both please

Sharp Discounts Wholesale Club has two service desks with one server at each desk. There is one desk at each entrance of the store. Customers arrive at each service desk at an average of one every six minutes following a Poisson distribution. Customers arriving at a service desk stay at that service desk and do not go to the other service desk for help. The average service time at each service desk is $216$ seconds per customer following the exponential service distribution.

How many customers, on average, are waiting in line in front of each service desk?

A$.10$

B$.0\mathrm{.}734$

C$.0\mathrm{.}9$

D$.16\mathrm{.}67$

QUESTION $19$

$3\mathrm{.}5$ points

Use the following information to answer questions $18-21$

Sharp Discounts Wholesale Club has two service desks with one server at each desk. There is one desk at each entrance of the store. Customers arrive at each service desk at an average of one every six minutes following a Poisson distribution. Customers arriving at a service desk stay at that service desk and do not go to the other service desk for help. The average service time at each service desk is $216$ seconds per customer following the exponential service distribution.

How much total time does a customer spend at the service desk either waiting for help or receiving help?

A$.7$ minutes

B$.15$ minutes

C$.9$ minutes

D$.10$ minutes