Experience the Tour de France (ETF) is a specialty travel agent. They arrange va

Question

Experience the Tour de France (ETF) is a specialty travel agent. They arrange vacations for amateur cyclists who want to experience the Tour de France by riding through one or more stages in the race. They have 4 people who take calls from clients. Each call lasts on average 20 minutes with a standard deviation of 40 minutes. A call arrives on average every 25 minutes with a standard deviation of 25 minutes. Round your answer to 2 decimal places.) On average, how many minutes does a caller wait before talking to an agent? minutes

Explanation / Answer

No of servers: 4

Mean Arrival rate:25 mins , so = 60/25

std dev of arrival rate = 60/25

Mean Service rate for 20 mins = 60/20

Std dev for service rate = 60/40

So Average waiting time Ws = 0.334 hours = 20.04 mins

Wq= 0.001 hours = 0.06 mins

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