Combinatorics (Fall 2010)/Problem set 6: Revision history

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12 January 2011

24 December 2010

23 December 2010

  • curprev 16:0016:00, 23 December 2010imported>WikiSysop 985 bytes +985 Created page with '== Problem 1 == <math>2m</math> 个小球,共m种颜色,每种颜色两个球,相同颜色的球不可区分。 取k个球,有多少种取法。 == Problem 2 == <math>[…'