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A certain car model has a mean gas mileage of 30 miles per gallon (mpg) with a standard deviation A pizza delivery company buys 57 of these cars. What is the probability that the average mileage of the fleet is greater than

30.3 mpg.

2 answers

It would help if you proofread your questions before you posted them.

No standard deviation.
The standard deviation is 3
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