A major credit card company has determined that its customers charge an average of $280 per month on their accounts with a standard deviation of $20.
a.What percentage of the customers charges more than $275 per month?b.What percentage of the customers charges less than $243 per month?c.What percentage of the customers charges between $241 and $301.60 per month?
What will be an ideal response?
| a. | 59.87% |
| b. | 3.22% |
| c. | 83.43% |
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