Question: A retailer sells a product whose demand has behaved according to a distribution Poisson of parameter 5. In the last 300 days, we followed a

A retailer sells a product whose demand has behaved according to a distribution

Poisson of parameter 5. In the last 300 days, we followed a policy of purchasing 8 items per day, having

verified that on 21 of those days, his stock did not arrive to satisfy orders. How many products

(at the very least) he should start buying daily if he wants to lower the probability of breakdown to 0.03

of stock? Note: Products not sold on the day are unusable.

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