If Y is the total time between a customer\'s arrival in the store and departure

Question

If Y is the total time between a customer's arrival in the store and departure from the service s the total time between a customer's arrival in the store and departure trom the service window and if Y is the time spent in line before reaching the window, the joint density of these variables was given in Exercise 5.15 to be elsewhere The random variable Yi - Y2 represents the time spent at the window service. Find E( Y2) and V(- Y2). Is it highly likely that a randomly selected customer would spend more than 4 minutes at the service window? 112). Is it nignly nkely that à Tandomly selected customer Wold spend nore than

Explanation / Answer

If Y is the total time between a customer's arrival in the store and departure

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