1) The inter arrival time at a counter is an exponential random variable with mean 10 minutes. The service time at the counter is also an exponential variable with mean 3 minutes. What is the probability that the counter is idle? The department will set up a second counter when the expected waiting time of a customer will be at least 3 minutes. What should be the average inter arrival time to justify a second counter?

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Subject: Optimization Engineering Please solve this problem
1) The inter arrival time at a counter is an exponential random variable with mean 10
minutes. The service time at the counter is also an exponential variable with mean
3 minutes. What is the probability that the counter is idle? The department will set
up a second counter when the expected waiting time of a customer will be at least
3 minutes. What should be the average inter arrival time to justify a second
counter?
Transcribed Image Text:1) The inter arrival time at a counter is an exponential random variable with mean 10 minutes. The service time at the counter is also an exponential variable with mean 3 minutes. What is the probability that the counter is idle? The department will set up a second counter when the expected waiting time of a customer will be at least 3 minutes. What should be the average inter arrival time to justify a second counter?
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