The customer service department for a company claims that 90% of all customer complaints are resolved to the satisfaction of the customer. A random sample of 15 customers who have filed complaints is selected. Let Y be the number of sampled customers whose complaints were resolved to the customer’s satisfaction. As- suming the claim is true, find the following. (a) P(Y ≤ 13) (b)P(Y > 10) (c) P(Y ≥ 14) (d)P(9 ≤ Y ≤ 12)

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