In a waiting line situation, arrivals occur at a rate of 3 per minute, and the service times average 4 per minute. Assume the Poisson

and exponential

distributions.

Find probability of no units in the system. 4. Find average number of units in the system.

5. Find average time in the waiting line.

6. Find average time in the system.

7. Find probability that there is one person

waiting. Find probability an arrival will have to wait