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Math Help - Variance question

  1. #1
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    Variance question

    I'm not sure I understand this problem based on what I know of variance. Can someone help?

    Suppose that 85% of all households bought in the last 4 months a product made by the Proctor & Gamble Corporation. If 386 households are selected at random, what is the variance of the number of households that bought in the last 4 months a product made by the Proctor & Gamble Corporation?
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  2. #2
    Forum Admin topsquark's Avatar
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    Please don't double post.

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