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)\"\" \"About 
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
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