solving a double summation joint probability function

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$Old$ November 1st, 2009, 05:12 PM

Fred1956 $Fred1956 is offline$

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$Default$ solving a double summation joint probability function

I am struggling with a double summation formula. I am trying to find the expected value for this discrete binomial joint probability function. The formula is attached in the pdf file. I would appreciate any help offered in how to solve this. In case it is not clear the fraction 1/2 is to the x1 power.

thanks

Fred1956

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x1.pdf (45.9 KB, 18 views)

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