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http://mathforum.org/kb/thread.jspa?messageID=7677377&tstart=0#7677377
>> I've never tried doing 250!/(30!*220!) in Excel

=GAMMALN(250+1)-GAMMALN(30+1)-GAMMALN(220+1) gives]]>Feb 25, 2012 11:52:29 AMFeb 25, 2012 11:52:29 AMwouter.meeussen@telenet.be0RE: Advanced Permutations software
http://mathforum.org/kb/thread.jspa?messageID=7676334&tstart=0#7676334
Hardya, It seems you have 250 locations, and need to choose 30 of them for A, while the other 220 automatically go to B. If that's a]]>Feb 24, 2012 7:30:45 AMFeb 24, 2012 7:30:45 AMbenb1Advanced Permutations software
http://mathforum.org/kb/thread.jspa?messageID=7676301&tstart=0#7676301
Amongst other things I want to know a]]>Feb 24, 2012 6:09:10 AMFeb 24, 2012 6:12:46 AMhardya2