statistics

The passing rate for the boards is 34%. If 70 people take the boards, the probability that 30 of them will pass the exam is?

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asked by Sam
  1. Try the binomial probability function:

    P(x) = (nCx)(p^x)[q^(n-x)]

    x = 70
    n = 30
    p = .34
    q = 1 - p = 1 - .34 = .66

    Substitute the values and go from there.

    An easier way would be to use a binomial probability table with the values stated above.

    I hope this will help.

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  2. Correction:

    x = 30
    n = 70

    The other values stay the same.

    Sorry for any confusion.

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