概率论试题求答案,最好有解题过程.

A∩B∩(非C)P(B-A)=P(AUB)-P(A)=0。6(C4 1)(C2 1)/(C6 2)=8/15(3-X)X/2=13X-X^2=2X^2-3X+2=0(X-1)(X-2)=0X=1or X=2P(Y=1)=P(X=1 U X=2)=1-P(X=0)-P(X=3)=1-0。6^3-0。4^3=1-0。216-0。064=0。72(X-1)~N(0,4)(X-1)/2~N(0/2,4/2^2)=N(0,1)P(X=1|X