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14111cwir8ws.5

# 14111cwir8ws.5 - Age Percent of Voting Age Population...

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12. A building contractor buys 70% of his cement from supplier A, and 30% from supplier B. A total of 90% of the bags from A arrive undamaged, while 95% of the bags from B arrive undamaged. Find the probability that a damaged bag came from supplier B. 13. The following table shows the proportion of people over 18 who are in various age categories, along with the probabilities that a person in a given age category will vote in a general election.
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Unformatted text preview: Age Percent of Voting Age Population Probability of a Person of this Age Voting 18 − 21 11 . . 48 22 − 24 7 . 6 . 53 25 − 44 37 . 6 . 68 45 − 64 28 . 3 . 64 65 or over 15 . 5 . 74 (a) Find the probability that a voter is in the age category 18 − 21. (b) Find the probability that a person who did not vote was in the age category 45 − 64. 5...
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