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Percentage of customers charges

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Reference no: EM133199086

Assignment:

A major department store has determined that its customers charge an average of $500 per month, with a standard deviation of $80. Assume the amounts of charges are normally distributed.

a. What percentage of customers charges more than $380 per month?

b. What percentage of customers charges less than $340 per month?

c. What percentage of customers charges between $644 and $700 per month?

Reference no: EM133199086

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