THree questions

Exhibit:The firm Best-Law-Service.com allows for extensive interaction between lawyers and their customers via the Internet. Best-Law-Service's broadly trained lawyers can answer incoming e-mail requests from any customer. E-mails arrive from 9am to 5pm at a rate of 6 per hour. The inter-arrival times of customer requests are exponentially distributed.

At each moment in time, there are exactly two lawyers "on call," that is, sitting at their desk waiting for incoming e-mails. It takes each lawyer, on average, 8 minutes to write the response email. The standard deviation of the response time of each lawyer is 4 minutes.

Question: The utilization of the lawyers is

1. A.0.4
2. B.0.6
3. C.0.8
4. D.1.0
5. E.Cannot be determined

Exhibit:The firm Best-Law-Service.com allows for extensive interaction between lawyers and their customers via the Internet. Best-Law-Service's broadly trained lawyers can answer incoming e-mail requests from any customer. E-mails arrive from 9am to 5pm at a rate of 6 per hour. The inter-arrival times of customer requests are exponentially distributed.

At each moment in time, there are exactly two lawyers "on call," that is, sitting at their desk waiting for incoming e-mails. It takes each lawyer, on average, 8 minutes to write the response email. The standard deviation of the response time of each lawyer is 4 minutes.

Question: The average time a customer has to wait to receive a response is approximately

A.12 minutes

B.10 minutes

C.9 minutes

D.8 minutes

E.5 minutes

Exhibit:The firm Best-Law-Service.com allows for extensive interaction between lawyers and their customers via the Internet. Best-Law-Service's broadly trained lawyers can answer incoming e-mail requests from any customer. E-mails arrive from 9am to 5pm at a rate of 6 per hour. The inter-arrival times of customer requests are exponentially distributed.

At each moment in time, there are exactly two lawyers "on call," that is, sitting at their desk waiting for incoming e-mails. It takes each lawyer, on average, 8 minutes to write the response email. The standard deviation of the response time of each lawyer is 4 minutes.

Question:The average number of customers in the system is approximately

1. A.1
2. B.2
3. C.3
4. D.4
5. E.Cannot be determined