document.write( "Question 869925: I have 7 CDs I want to select 4 to play in my car CD player. In how many ways can I select 4 of 7 CDs? \n" ); document.write( "
Algebra.Com's Answer #524557 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! 7*6*5*4 = 840 \n" ); document.write( "But, selecting A, B, C & D is the same as D,B,A & C \n" ); document.write( "4*3*2*1 = 24 \n" ); document.write( "--> 840/24 = 35 ways \n" ); document.write( " \n" ); document.write( " |