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John and Mark have each committed to charity each week for the next year. Their weekly incomes are independent of each other. Suppose the amount
John and Mark have each committed to charity each week for the next year. Their weekly incomes are independent of each other. Suppose the amount donated in a week by John is normally distributed with a mean of $37 and a standard deviation of $8, and the amount donated by Mark is also normally distributed with a mean of $45 and a standard deviation of $4. Estimate the number of weeks in a 52-week year that their combined donation will exceed $93?
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