Waiting for service is part of daily life and it is a well-known fact that eliminating waiting
altogether is not a feasible option because the cost of installing and operating the service facility
can be prohibitive. Our only recourse is to strike a balance between the cost of offering a service
and the cost of waiting experienced by customers. Suppose car importers arrive at Malawi
Revenue Authority (MRA) Offices - Songwe border to clear their new imported cars at the rate
of 52 per hour. There are 5 identical service points handling clearances and each service point
can handle 22 customers per hour. Determine the following:
a) The probability that there will be no one in the system. (5 marks)
b) The average number of importers waiting for the service.