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17.Rachel buys a new CD on which there is her favorite track, 7 other tracks she likes and 2 tracks that she does not like. She sets her CD player to play at random.What is the probability that the first track it plays is her favored?Write your answer as a decimal. 16. The police line up 10 people in an identity parade; only one of the people is the criminal.A witness does not recognize the criminal and so chooses a person at random.What is the probability that the criminal is NOT chosen?Write your answer as a decimal.
