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A racing car consumes a mean of 86 gallons of gas per race with a standard...

A racing car consumes a mean of 86 gallons of gas per race with a standard deviation of 7 gallons.

If 41 racing cars are randomly selected, what is the probability that the sample mean would be less than 84.1 gallons? Round your answer to four decimal place.

math   Statistics-And-Probability   
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