how to find n choose r without overflow

Posted by iamrohitbanga on Stack Overflow See other posts from Stack Overflow or by iamrohitbanga
Published on 2010-05-22T21:14:30Z Indexed on 2010/05/22 21:30 UTC
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overflow

I need to find the value of n choose r- the number of ways of selecting r objects out of n.

if i first find the numerator then the denominator. i get an exception.

i am using java.

how to do it for example for 44 choose 42

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