The mean arrival rate to a service centre is 3 per hour. The mean service time is found
to be 10 minutes foe service. Assuming Poisson arrival and exponential service time,
find
(i) the utilisation factor for this service facility,
(ii) the probability of two units in the system,
(iii) the expected number of units in the system, and
(iv) the expected time in hours that a customer has to spend in the system.
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