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Math Help - Probability

  1. #1
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    Probability

    This is a seemingly easy question, but it seems a tad bit obvious for the level it's at, which is why I'm asking for a second opinion.

    The question, in its' shortest version essentially says
    1 in 100 chickens is red according to the such and such farmers association.
    what is the probability in a random sample of 5 chickens that at least 1 in 5 chickens is red?

    Any help would be greatly appreciated.
    Last edited by Slumzo; October 21st 2008 at 03:14 PM.
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  2. #2
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    Quote Originally Posted by Slumzo View Post
    The question, in its' shortest version essentially says 1 in 100 chickens is red. what is the probability that at least 1 in 5 chickens is red?
    Reword the question. Genetics tells us that 1 in a 100 chickens is red.
    We pick five chickens at random. What is the probability that at least one is red?
    The probability that none is red equals (.99)^5.
    So what is the probability that at least one is red? (Think complement).
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