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Math Help - Probabilities

  1. #1
    Junior Member SirOJ's Avatar
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    Probabilities

    Sets are beginning to do my head in. A little help please...

    For two events
    J and K, if P(J) = 0.1 and P(K) = 0.4 and
    P(J intersection K) = 0.05, what is


    P
    (J' intersectionK)? where J' = not in J

    Drawing a venn diagram, and fillinf in figures I got answer = 0.35

    Is this correct?
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  2. #2
    MHF Contributor

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    Quote Originally Posted by SirOJ View Post
    Sets are beginning to do my head in. A little help please...

    For two events
    J and K, if P(J) = 0.1 and P(K) = 0.4 and
    P(J intersection K) = 0.05, what is


    P
    (J' intersectionK)? where J' = not in J

    Drawing a venn diagram, and fillinf in figures I got answer = 0.35

    Is this correct?
    P(K)=P(K\cap J)+P(K\cap J')
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