In 2009, there were 33, 722 traffic facilities in the United States. Of these, 8

Question

In 2009, there were 33, 722 traffic facilities in the United States. Of these, 8787 were alcohol related. Write your answer with three decimal places and percent with one decimal place a) What is the probability that a randomly selected traffic fatality in 2009 was alcohol related? b) What is the probability that a randomly selected traffic fatality in 2009 was not alcohol related? c) What is the probability that two randomly selected traffic fatality in 2009 were both alcohol related? d) What is the probability that neither of two randomly selected traffic fatalities in 2009 were alcohol related? e) What is the probability that of two randomly selected traffic fatalities in 2009 at least one alcohol related? The following data represent the number of cases of coffee or filters sold by four sales reps in a recent sales competition. Write your answer in fraction and decimal with three places a) What is the probability that a randomly selected case was sold by Bryce? Is this unusual? B) What is the probability that a randomly selected case was Gourmet? c) What is the probability that a randomly selected Single-Cup case was sold by Mallory? d) What is the probability that a randomly selected Gourmet case was sold by Bryce? Is this unusual?

Explanation / Answer

a)P(alcohol)=p=9787/33722= 0.2902

b)P( Not alcohol) = q = 1- 0.2902 = 0.7098

c)P(two are alcohol related) = p^2 =0.084

d) P( Both are not alcohol related) = q^2 = 0.5038

e) Required probability= 1- P( none are alcohol related) = 1- 0.5038 = 0.4962

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