题目已知随机变量X满足P(|X-EX|≥2)=1/16,则必有()。A. DX=1/4B. DX≥1/4C. P(|X-EX|D. DX已知随机变量X满足P{|X-EX|≥2}=1/16,则必有()。A. DX=1/4B. DX≥1/4C. P{|X-EX|<2}=15/16D. DX<1/4题目解答答案A. DX=1/4