My Math Forum Another Probability Question

 February 6th, 2011, 09:16 PM #1 Newbie   Joined: Feb 2011 Posts: 3 Thanks: 0 Another Probability Question I have no idea how to handle this question 6. Thirty percent of all automobiles undergoing a headlight inspection at a certain inspection station fail the inspection. (A) Among 15 randomly selected cars, what is the probability that at most four fail the inspection? (B) Among 15 selected cars, what is the probability that between five and ten (inclusive) fail the inspection? (C) Among 20 randomly selected cars, what is the mean value of the number that pass the inspection? (D) What is the probability that among 20 randomly selected cars, the number that pass is within one standard deviation of the mean value?

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### (d) what is the probability that among 25 randomly selected cars, the number that pass is within 1 standard deviation of the mean value?

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