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    Mathdummy's Avatar
    Mathdummy Posts: 2, Reputation: 1
    New Member
     
    #1

    Jan 14, 2008, 09:55 AM
    Unsure on How I got It Right. I guessed at this.
    In the United States, 43% of people wear a seat belt while driving. If two people are chosen at random, what is the probability that both of them wear a seat belt?

    Answer is 18%

    What is the formula to get this answer.
    PolluxCastor's Avatar
    PolluxCastor Posts: 117, Reputation: 5
    Junior Member
     
    #2

    Jan 14, 2008, 04:54 PM
    The probability that 2 independent events both happen is the product of their individual probabilities. In this case - .43 * .43 is .1849

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