题目4/20单选题(5分) 若随机变量X~P(10),则其方差D(X)=()。A. 1B. 10C. 100D. 10004/20单选题(5分) 若随机变量X~P(10),则其方差D(X)=()。A. 1B. 10C. 100D. 1000题目解答答案B. 10