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Math Help - Probability

  1. #1
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    Probability

    Given Pr(B) = 1/3, Pr(A|B) = 2/3 and Pr(A|B') = 3/7, determine:

    a) Pr(A∩B')
    = 2/7

    b) Pr(A)
    = 3/7

    c) Pr(B'|A)
    = ?
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  2. #2
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    Re: Probability

    Hey Fratricide.

    Hint: P(B'|A) = P(B' and A)/P(A) by definition of conditional probability.
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  3. #3
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    Re: Probability

    So: (2/7)/(3/7) = 2/3?
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  4. #4
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    Re: Probability

    Yes that's correct.
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