The number of days x after mailout it takes a utility


Question: The number of days (X) after mailout it takes a utility company to receive payment for a customer's bill is a normal random variable with a mean of 31 days and a standard deviation of 6 days.

- The latest 2.5% of bills will be received more than how many days after mailout?

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Basic Statistics: The number of days x after mailout it takes a utility
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