(1) An unbiased six-sided die is cast 30 independent times.Let X be the number
of ones and Y the number of twos.
question: E(X^X-4XY+3Y^Y)=?
(2) Let f(x)=1/10 x=0,1,2,....,9 and h(y|x)=1/(10-x) y=x,x+1,.....,9
question: f(x,y)=?
f(y)=?
E(Y|x)=?
就以上兩題
請同學幫忙回答
謝謝
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