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?
(In reply to
I undestood right? by pcbouhid)
Two problems: the odds of a person playing another in the first round
are 1/(N-1) -- he will play someone, and there are N-1 other players --
so your answer isn't right.
And, I didn't say "the first round" but "in a tennis tournament"... so you should take into account the next rounds too!