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排列组合公式生活中常用的数学知识(mmxhero),电脑网络,邱少时空站
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英雄无敌 54 级
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222.50.154.241
2005-11-21 17:31
  【原创】排列组合公式生活中常用的数学知识
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譬如 从12个不同颜色的球中任意拿出2个 有多少中拿法?

套用公式B=66

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