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The monthly utility bills in a city are normally distributed, with a mean of $100 and a standard deviation of $12. Find the probability that

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The monthly utility bills in a city are normally distributed, with a mean of $100 and a standard deviation of $12. Find the probability that a randomly selected utility bill is (a) less than $65, (b) between $87 and $120, and (c) more than $140. (a) The probability that a randomly selected utility bill is less than $65 is (Round to four decimal places as needed.)

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