probability

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hi!
how would you figure out a problem where you are given a probability of success for 12 people and you are trying to find the probability of success for 1 person?

  • probability -

    Can you assume the probability of success is the same for everybody? Does success for 12 mean that each person was successful? If so.

    Let p=probablity of success for one person. Let x be the known probability of success for 12 people.

    So for 12 people p^12 = x.
    Take natural logs of both sides.
    12*ln(p) = ln(x). So
    ln(p) = ln(x)/12. Ln(x)/12 is a known number -- call it h.

    so p = e^h.

    QED
    Take the natural logs of both sides.

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