Essay
Sam is a trucker and believes that for every 60 miles he drives on the freeway in Indiana, there is an average of two state troopers checking his speed with a radar gun.
A) What is the probability that at least one trooper is checking his speed on a randomly selected 60-mile stretch?
B) What is the probability that exactly three troopers are checking his speed on a randomly selected 60-mile stretch?
C) Sam drives 240 miles a day. What is the average number of state troopers who check his speed on a given day?
D) Sam drives 240 miles a day. What is the probability that exactly five troopers check Sam's speed on a randomly selected day?
Correct Answer:
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a. 0.8647
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Correct Answer:
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