Find Var(x) and Var(y) based on the joint PMF

Suppose X and Y have the following joint PMF.
æ\y_ 1
1/6 0
1/12 1/12 0
1/12 1/12 0
1/6 0
1/6 0

Image Transcription

Suppose X and Y have the following joint PMF. æ\y_ 1 2 3 4 1/6 1/6 0 1 1/12 1/12 0 1/12 1/12 0 1/6 0 3 4 6 1/6 0

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