document.write( "Question 463999: You have 7 old books and need to choose 4 to give away. How many different groups of 4 books can you make? \n" ); document.write( "
Algebra.Com's Answer #317816 by edjones(8007)![]() ![]() You can put this solution on YOUR website! nCr=Combination of n things taken r at a time=n!/((n-r)!*r!) \n" ); document.write( "7C4=35 \n" ); document.write( ". \n" ); document.write( "Ed \n" ); document.write( " |