Professional tennis player Novak Djokovic hits the ball extremely hard. His first-serve speeds can be modeled by
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Professional tennis player Novak Djokovic hits the ball extremely hard. His first-serve speeds can be modeled by a Normal distribution with mean 112 miles per hour (mph) and standard deviation 5 mph.
a. How often does Djokovic hit his first serve faster than 120 mph?
b. What percent of Djokovic’s first serves are slower than 100 mph?
c. What proportion of Djokovic’s first serves have speeds between 100 and 110 mph?
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