Question 1012888
.
how many ways can i choose 4 outfits to take on vacation if i have 10 outfits to from which to choose
-----------------------------------------------------------------------


{{{C[10]^4}}} = {{{10!/(4!*6!)}}} = {{{10*9*8*7)/(1*2*3*4)}}} = 210.


See the lesson <A HREF=http://www.algebra.com/algebra/homework/Permutations/Introduction-to-Combinations-.lesson>Introduction to Combinations</A> in this site.