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In: Statistics and Probability

Chase Bank account division has collected data on the age of credit accounts. The data collected...

Chase Bank account division has collected data on the age of credit accounts. The data collected indicate that the age of the accounts follows a normal distribution with mean 18 years and standard deviation 6 years.
a. What proportion of the accounts are between 20 and 32 years old?
b. What is the number of years in which 75% of all accounts are above?

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