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已知随机变量ξ服从正态分布,且方程x2+2x+ξ=0有实数解的概率为,若P(ξ≤...
已知随机变量ξ服从正态分布,且方程x
2+2x+ξ=0有实数解的概率为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024182646104358062/SYS201310241826461043580004_ST/0.png)
,若P(ξ≤2)=0.8,则P(0≤ξ≤2)=( )
A.0.6
B.0.4
C.0.8
D.0.2
考点分析:
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