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Homework Help: Finding marginal Probability Functions ? Anyone

  1. Nov 22, 2008 #1
    Finding marginal Probability Functions ??? Anyone

    I have this question which I cannot seem to solve:
    The joint probability mass function p(x, y) of two discrete random variables X and Y is given by.
    p(x,y) = ([5^x][7^y][e^-5])/x!(y-x)!
    x and y are non-negative integers and x <= y
    (i) Find the marginal probability mass functions of X and Y.
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
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