Question: Miles per gallon for 2009 vehicles. Exercise 4.26 indicates that city gas mileage for 2009 model year vehicles is approximately Normal with mean 17.3 miles

Miles per gallon for 2009 vehicles. Exercise 4.26 indicates that city gas mileage for 2009 model year vehicles is approximately Normal with mean 17.3 miles per gallon and standard deviation 4.2 miles per gallon.

(a) What is the probability that a randomly selected 2009 vehicle has city mpg greater than 20?

(b) What is the probability that a randomly selected 2009 vehicle has city mpg between 18 and 25?

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