Question: dont copy paste other questions response Solve carefully, other answer on Chegg is wrong At a coffee shop, there are three cashiers providing checkout service

dont copy paste other questions response

Solve carefully, other answer on Chegg is wrong At a coffee shop, there are three cashiers providing checkout service simultaneously. On average, customers arrive at the checkout area every 6 minutes. It is estimated that the customer arrival process is a Poisson process. The average checkout time for each customer is 12 minutes, with its standard deviation equal to 18 MINUTES. Suppose that customers form a single line. What is the average waiting time in minutes for a customer? Note: Keep 2 decimal places for your final answer. Either use Excel for your calculation or keep 4 decimal places for your intermediate numbers. The Poisson arrival process has exponentially distributed inter-arrival times

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