已知随机变量x 分布列为:x =-2 p =1/12 x =-1 p =3/12.x =0 p =4/12 x =1 p
已知随机变量x 分布列为:x =-2 p =1/12 x =-1 p =3/12.x =0 p =4/12 x =1 p =1/12 x =2 p =2/12.x ...
已知随机变量x 分布列为:x =-2 p =1/12 x =-1 p =3/12.x =0 p =4/12 x =1 p =1/12 x =2 p =2/12.x =3 p =1/12求(1)y =1/2x (2)z =x ^2的分布列