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Pair Playing Probability (Posted on 2005-08-02) Difficulty: 3 of 5
There are N players in a tennis tournament. Assuming the initial pairings are done randomly, what are the odds that a certain pair will play each other?

  Submitted by Old Original Oskar!    
Rating: 3.0000 (2 votes)
Solution: (Hide)
There are N-1 matches. The number of possible pairings is N(N-1)/2. As all matches have the same probability, the answer is #MATCHES/#PAIRINGS = 2/N.

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionExplanation to Puzzle Answer K Sengupta2022-12-31 00:30:30
answerK Sengupta2007-09-01 05:29:24
The Solution?? - correctionPaul2005-08-29 02:28:28
Some ThoughtsThe Solution???Paul2005-08-29 02:01:47
Solution for any one roundPaul2005-08-28 12:36:13
SolutionSolutionowl2005-08-18 14:56:32
Questionvariable changeAdam2005-08-08 22:37:57
re: No Subject - to ritenpcbouhid2005-08-08 15:01:01
SolutionNo Subjectriten2005-08-08 13:50:23
re(3): The full tournament - to e.g.pcbouhid2005-08-05 14:22:49
Some Thoughtsre(2): The full tournamente.g.2005-08-05 01:30:58
Hints/TipsLogic?Cory Taylor2005-08-04 21:50:38
re: The full tournamentpcbouhid2005-08-04 20:10:41
forget, FK, it´s wrong againpcbouhid2005-08-04 20:01:05
Hey, FK, another answer...pcbouhid2005-08-04 17:27:21
re(2): my new answer -- still wrongpcbouhid2005-08-03 21:14:00
Some Thoughtsre: my new answer -- still wrongFederico Kereki2005-08-03 20:57:51
my new answerpcbouhid2005-08-03 19:44:05
re(2): my answer - you´re rightpcbouhid2005-08-03 18:17:14
Some Thoughtsre: my answere.g.2005-08-03 16:25:06
my answerpcbouhid2005-08-03 16:04:48
Some Thoughtsre: My AnswerFederico Kereki2005-08-03 04:07:48
My AnswerGary2005-08-03 03:02:17
SolutionA special casee.g.2005-08-02 21:57:38
Some Thoughtsre(3): I undestood right? - no, WRONG.Federico Kereki2005-08-02 20:09:12
SolutionThe full tournamentCharlie2005-08-02 19:05:57
re(2): I undestood right? - Charliepcbouhid2005-08-02 18:44:16
re(2): I undestood right? - no, WRONG.pcbouhid2005-08-02 18:18:16
re(2): I undestood right? - to Charliepcbouhid2005-08-02 18:13:14
Some Thoughtsre: I undestood right? - no, WRONG.Old Original Oskar!2005-08-02 15:53:45
re: I undestood right?Charlie2005-08-02 15:11:25
I undestood right?pcbouhid2005-08-02 15:02:08
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