设随机变量X~N,已知P{2≤x≤4}=0.4,则P{x≤0}=()
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设随机变量X~N(a,),已知P{2≤x≤4}=0.4,则P{x≤0}=()
A.0.4
B.0.3
C.0.2
D.0.1
参考答案:
设随机变量X~N(a,),已知P{2≤x≤4}=0.4,则P{x≤0}=()
A.0.4
B.0.3
C.0.2
D.0.1
参考答案: