C cutemouse Account Closed Joined Apr 23, 2007 Messages 2,250 Gender Undisclosed HSC N/A Apr 21, 2009 #1 Hello, Do we need to know the proof of the formula for nCr? Thanks
oly1991 Member Joined Nov 20, 2008 Messages 411 Location Sydney Gender Male HSC 2009 Apr 21, 2009 #2 i don't know if you need to know it but it might help in some situations... its just nPr/r! and then you go from there.
i don't know if you need to know it but it might help in some situations... its just nPr/r! and then you go from there.
