Question: For a single server, single queue system with an arrival rate of 12 customers per hour and a service rate of 20 customers per hour,

For a single server, single queue system with an arrival rate of 12 customers per hour and a service rate of 20 customers per hour, what is the mean server utilization (to two decimal places)?

For a single server, single queue system with an arrival rate of 6 customers per hour and a service rate of 15 customers per hour, what is the probability of exactly one customer in the system (to two decimal places)?

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