一个箱子里有3个一模一样的球,除颜色外,两个红,一个白,请问:一次性摸出两个球,两个球都是红球的几率是多少?刚刚中考,我填了1/2TʌT
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/13 11:57:28
![一个箱子里有3个一模一样的球,除颜色外,两个红,一个白,请问:一次性摸出两个球,两个球都是红球的几率是多少?刚刚中考,我填了1/2TʌT](/uploads/image/z/7826702-14-2.jpg?t=%E4%B8%80%E4%B8%AA%E7%AE%B1%E5%AD%90%E9%87%8C%E6%9C%893%E4%B8%AA%E4%B8%80%E6%A8%A1%E4%B8%80%E6%A0%B7%E7%9A%84%E7%90%83%2C%E9%99%A4%E9%A2%9C%E8%89%B2%E5%A4%96%2C%E4%B8%A4%E4%B8%AA%E7%BA%A2%2C%E4%B8%80%E4%B8%AA%E7%99%BD%2C%E8%AF%B7%E9%97%AE%EF%BC%9A%E4%B8%80%E6%AC%A1%E6%80%A7%E6%91%B8%E5%87%BA%E4%B8%A4%E4%B8%AA%E7%90%83%2C%E4%B8%A4%E4%B8%AA%E7%90%83%E9%83%BD%E6%98%AF%E7%BA%A2%E7%90%83%E7%9A%84%E5%87%A0%E7%8E%87%E6%98%AF%E5%A4%9A%E5%B0%91%3F%E5%88%9A%E5%88%9A%E4%B8%AD%E8%80%83%EF%BC%8C%E6%88%91%E5%A1%AB%E4%BA%861%2F2T%26%23652%3BT)
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