(Answered) Weekly demand for a certain brand of toothpaste in a local

Statistics

Weekly demand for a certain brand of toothpaste in a local retail store has a Poisson distribution with expected value 5. The store replenishes the stock weekly so that the starting inventory on the shelf at the beginning of each week is 8. What is the expected shortfall at the end of the week? That is, what is the expected number of demands in excess of the initial stock?

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