1.
Calculate P(X1, Y1)
X1 : X=0, X=1
Y1 : Y=1, Y=2
From the table
P(X=0,Y=1) = 20/66 ; P(X=0,Y=2) = 6/66 ; P(X=1,Y=1) = 12/66 ; P(X=1,Y=2) = 0
2.
Marginal probability mass function fX(x) of the random Variable X
For X=0
x | 0 | 1 | 2 |
fX(x) | 36/66 | 27/66 | 3/66 |
or
x | 0 | 1 | 2 |
fX(x) | 12/22 | 9/22 | 1/22 |
Mean : E(X)
Mean = 1/2 =0.5
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