箱子里有4个球,2白2红,四个人依次摸,不放回,求第二个人摸出红球且第三个人摸出白球的几率亲们,答案是三分之一,辛苦了
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/18 07:23:20
![箱子里有4个球,2白2红,四个人依次摸,不放回,求第二个人摸出红球且第三个人摸出白球的几率亲们,答案是三分之一,辛苦了](/uploads/image/z/15169191-15-1.jpg?t=%E7%AE%B1%E5%AD%90%E9%87%8C%E6%9C%894%E4%B8%AA%E7%90%83%2C2%E7%99%BD2%E7%BA%A2%2C%E5%9B%9B%E4%B8%AA%E4%BA%BA%E4%BE%9D%E6%AC%A1%E6%91%B8%2C%E4%B8%8D%E6%94%BE%E5%9B%9E%2C%E6%B1%82%E7%AC%AC%E4%BA%8C%E4%B8%AA%E4%BA%BA%E6%91%B8%E5%87%BA%E7%BA%A2%E7%90%83%E4%B8%94%E7%AC%AC%E4%B8%89%E4%B8%AA%E4%BA%BA%E6%91%B8%E5%87%BA%E7%99%BD%E7%90%83%E7%9A%84%E5%87%A0%E7%8E%87%E4%BA%B2%E4%BB%AC%EF%BC%8C%E7%AD%94%E6%A1%88%E6%98%AF%E4%B8%89%E5%88%86%E4%B9%8B%E4%B8%80%EF%BC%8C%E8%BE%9B%E8%8B%A6%E4%BA%86)
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