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Revision history of "1988 USAMO Problems/Problem 3"

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  • (cur | prev) 19:44, 3 July 2013‎ Etude (talk | contribs)‎ . . (494 bytes) (+15)‎
  • (cur | prev) 14:58, 15 May 2012‎ 1=2 (talk | contribs)‎ . . (479 bytes) (+479)‎ . . (Created page with "==Problem== Let <math>X</math> be the set <math>\{ 1, 2, \cdots , 20\}</math> and let <math>P</math> be the set of all 9-element subsets of <math>X</math>. Show that for any map ...")
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