将三个球放入四个杯子,最大个数为2的概率是多少我的想法是4*3*2/4*4*4就是说分母上每次球都从四个杯子里选一个分子上,先让第一个球从4个杯子中选一个,让第二个球从剩下3个里选一个,最后
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![将三个球放入四个杯子,最大个数为2的概率是多少我的想法是4*3*2/4*4*4就是说分母上每次球都从四个杯子里选一个分子上,先让第一个球从4个杯子中选一个,让第二个球从剩下3个里选一个,最后](/uploads/image/z/3785340-12-0.jpg?t=%E5%B0%86%E4%B8%89%E4%B8%AA%E7%90%83%E6%94%BE%E5%85%A5%E5%9B%9B%E4%B8%AA%E6%9D%AF%E5%AD%90%2C%E6%9C%80%E5%A4%A7%E4%B8%AA%E6%95%B0%E4%B8%BA2%E7%9A%84%E6%A6%82%E7%8E%87%E6%98%AF%E5%A4%9A%E5%B0%91%E6%88%91%E7%9A%84%E6%83%B3%E6%B3%95%E6%98%AF4%2A3%2A2%2F4%2A4%2A4%E5%B0%B1%E6%98%AF%E8%AF%B4%E5%88%86%E6%AF%8D%E4%B8%8A%E6%AF%8F%E6%AC%A1%E7%90%83%E9%83%BD%E4%BB%8E%E5%9B%9B%E4%B8%AA%E6%9D%AF%E5%AD%90%E9%87%8C%E9%80%89%E4%B8%80%E4%B8%AA%E5%88%86%E5%AD%90%E4%B8%8A%2C%E5%85%88%E8%AE%A9%E7%AC%AC%E4%B8%80%E4%B8%AA%E7%90%83%E4%BB%8E4%E4%B8%AA%E6%9D%AF%E5%AD%90%E4%B8%AD%E9%80%89%E4%B8%80%E4%B8%AA%2C%E8%AE%A9%E7%AC%AC%E4%BA%8C%E4%B8%AA%E7%90%83%E4%BB%8E%E5%89%A9%E4%B8%8B3%E4%B8%AA%E9%87%8C%E9%80%89%E4%B8%80%E4%B8%AA%2C%E6%9C%80%E5%90%8E)
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