1. Products arrive for inspection at the rate of 18 per hour. What difference would it make to:

a) The average number of products in the system

b) The average number of products in the queue

c) The average time in the system, and

d) The average time in the queue.

If the service rate, could be increased from 24 to 30 per hour

2. People arrive at a cinema ticket booth in a Poisson distributed arrival rate of 25 per hour. Service time is exponentially distributed with an average time of 2 minutes. Calculate the following:

a) Mean number in the waiting line;

b) Mean waiting time;

c) Mean numbers in the system;

d) Mean time in the system

e) Utilization factor.