49个号码组成三个号码为一组~~一共有多少组

1-49个数字有多少三个号码的组合?
如果1-49出6个号码~有多少组相同?(能中多少组)

49选3的组合是49*48*47/3*2*1=18424个
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第1个回答  2010-10-30
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