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Mathematics, 28.03.2021 23:00 nurikchan

Suppose the monthly charges for cell phone plans in the U. S. are normally distributed with a mean of $62 and a standard deviation of $10. What is the proportion of cell phone plans charging less than $42 a month for service?

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Suppose the monthly charges for cell phone plans in the U. S. are normally distributed with a mean o...
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