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Important information about Normal distribution probability

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The amounts of money requested on home loan applications at Down River Federal Savings follow the normal distribution, with a mean of $70,000 and a standard deviation of $20,000. A loan application is received this morning. What is the probability?
a. The amount requested is $80,000 or more?
b. The amount requested is between $65,000 and $80,000?
c. The amount requested is $65,000 or more?

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This solution shows how to calculate probabilities from a normal distribution.

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