A Local Bank Has Determined That the Daily Balances of the Checking

question 53

Essay

A local bank has determined that the daily balances of the checking accounts of its customers are normally distributed with an average of $280 and a standard deviation of $20.
a.What percentage of its customers has daily balances of more than $275?
b.What percentage of its customers has daily balances less than $243?
c.What percentage of its customers' balances is between $241 and $301.60?
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