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Homework Help: Binomial Distribution

  1. Nov 18, 2012 #1
    1. The problem statement, all variables and given/known data

    Find the value of Ʃn(18 n)(0.46)^2(0.54)^(18-n)
    The sum is from n = 0 to n=18

    Sorry, I do not know how to format it.

    2. Relevant equations

    I am using the Binomial Expansion Theorem: 4445cf49d9008c2cd8defb0dc7b83302.png

    3. The attempt at a solution

    Not sure where to start.

    P = 0.46
    Q = 0.54
    n = 18
    k = ?
  2. jcsd
  3. Nov 18, 2012 #2

    Ray Vickson

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    Science Advisor
    Homework Helper

    More generally,
    [tex] (a+b)^N = \sum_{n=0}^N {N \choose n} a^n b^{N-n}.[/tex]

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