Advanced Placement (AP), 25.01.2021 20:20, sequoyaburke

Professional tennis player Novak Djokovic hits the ball extremely hard. His first-serve speeds follow an approximately Normal distribution with mean 115 miles per hour (mph) and standard deviation 6 mph. Choose one of Djokovic’s first serves at random. Let = its speed, measured in miles per hour. Round your answer to 2 decimal places.

About 15% of Djokovic’s first serves will be at most miles per hour

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Professional tennis player Novak Djokovic hits the ball extremely hard. His first-serve speeds follo...