The speeds of vehicles on a highway with speed limit 100 km/h are normally distributed

Chapter 8, Problem 15

(choose chapter or problem)

The speeds of vehicles on a highway with speed limit 100 km/h are normally distributed with mean 112 km/h and standard deviation 8 km/h.(a) What is the probability that a randomly chosen vehicle is traveling at a legal speed?(b) If police are instructed to ticket motorists driving 125 km/h or more, what percentage of motorists are targeted?

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