多选题

【单选】设X，Y是两个随机变量，且相互独立，则下列表达式不正确的是()

Question

A. E(XY) = E(X)E(Y)

B. E(X+Y) = E(X) + E(Y)

C. D(X+Y) = D(X) + D(Y)

D. D(XY) = D(X)D(Y)