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Probability that a randomly selected electric bill

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Problem: Monthly electric bills in a large city are normally distributed with a mean of $240 and a standard deviation of $45. What is the probability that a randomly selected electric bill has a value between $280 and $320?

Reference no: EM131152969

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Probability that a randomly selected electric bill : Problem: Monthly electric bills in a large city are normally distributed with a mean of $240 and a standard deviation of $45. What is the probability that a randomly selected electric bill has a value between $280 and $320?
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