R RofL Member Joined Sep 24, 2009 Messages 33 Gender Undisclosed HSC 2009 Oct 25, 2009 #1 A class of 22 studients is to be divided into 4 groups consisting of 4,5,6,7 students. In how many ways can this be done? leave answer unsimpiflied
A class of 22 studients is to be divided into 4 groups consisting of 4,5,6,7 students. In how many ways can this be done? leave answer unsimpiflied
gurmies Drover Joined Mar 20, 2008 Messages 1,209 Location North Bondi Gender Male HSC 2009 Oct 25, 2009 #2 22C7 x 15C6 x 9C5 x 4C4 = 22!/(4! x 5! x 6! x 7!)
R RofL Member Joined Sep 24, 2009 Messages 33 Gender Undisclosed HSC 2009 Oct 25, 2009 #3 gurmies said: 22C7 x 15C6 x 9C5 x 4C4 = 22!/(4! x 5! x 6! x 7!) Click to expand... do you have to divide by 4!?
gurmies said: 22C7 x 15C6 x 9C5 x 4C4 = 22!/(4! x 5! x 6! x 7!) Click to expand... do you have to divide by 4!?
