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statistics

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A class consists of 50 students, 20 of them are girls and boys, 10 them are rich and remaining poor, 5 of them are fair complxioned, 3 are intelligent. What is the probability of selecting a fair complexioned rich intelligient girl?

  • statistics - ,

    Proofread your questions before you post them.

    "20 of them are girls and boys"?

    I will asume 20 are girls and 30 are boys.

    P(fair) = 5/50
    p(rich) = 10/50
    p(IQ) = 3/50
    P(girl) = 20/50

    Probability of all events occurring is found by multiplying the individual probabilities.

  • statistics - ,

    .25
    .125
    .312
    .687

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