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Suppose that the annual income of a fast-food chain is normally distributed with a mean of $72,000 and a standard deviation of $9,000. a) What

Suppose that the annual income of a fast-food chain is normally distributed with a mean of $72,000 and a standard deviation of $9,000.

a) What is the probability that a randomly selected fast-food restaurant will generate an annual income between $65,000 and $75,000 ?

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