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Math Help - joint PMF

  1. #1
    Newbie
    Joined
    Apr 2010
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    9

    joint PMF

    A function claimed to be a joint PMF is given as
    pX,Y (i, j) =
    (􀀀1
    2
    (i+j)
    , if i 2 {1, 2, . . .}, j 2 {1, 2, . . .}
    0, o.w.
    .
    (a) Show that this is a legitimate joint PMF.
    (b) Find E[3X + 5Y ].
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  2. #2
    MHF Contributor matheagle's Avatar
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    Please retype this
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