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已知盒子里有2个黄色球和3个红色球,每个球除颜色外均相同,现从中任取一个球,则取...
已知盒子里有2个黄色球和3个红色球,每个球除颜色外均相同,现从中任取一个球,则取出红色球的概率是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101194107837608809/SYS201311011941078376088005_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101194107837608809/SYS201311011941078376088005_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101194107837608809/SYS201311011941078376088005_ST/2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101194107837608809/SYS201311011941078376088005_ST/3.png)
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A.
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D.
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A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101194107837608809/SYS201311011941078376088002_ST/images0.png)
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D.
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下列运算,正确的是( )
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