P{X=i}=(3Ci)(0.3^i)(1-0.3)^i (i=0,1,2,3) 概率分布如下 X | 0 1 2 3 P | 0.343 0.441 0.189 0.027 Y=X^2=4 即X=2 ,P{Y=4}= P{X=2}=0.189
