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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 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 of less than $243?
c.
What percentage of its customers' balances is between $241 and $301.60?
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