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deleted.

 Oct 20, 2019
edited by sinclairdragon428  Nov 20, 2019
 #1
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+1

\frac{(N-1)!(N)}{(N+1)!}.

 

\(\frac{(N-1)!(N)}{(N+1)!}\\ =\frac{(N-1)!(N)}{(N-1)!N(N+1)}\\ =\frac{1}{N+1}\)

.
 Oct 20, 2019

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