document.write( "Question 180551: A library has 6 books abut u are only allowed to check out 4 at a time how many diffrent combinations of books can u have \n" ); document.write( "
Algebra.Com's Answer #135314 by stanbon(75887)\"\" \"About 
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6C4 = 6C2 = 6*5/1*2 = 15
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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