document.write( "Question 1137970: In how many ways can a selection of at least two CDs be made from a set of 7 CDs \n" ); document.write( "
Algebra.Com's Answer #755832 by Boreal(15235)![]() ![]() You can put this solution on YOUR website! This is 7C2=21 \n" ); document.write( "It is 7!/2!*5! \n" ); document.write( "=7*6/2*1 \n" ); document.write( " |