document.write( "Question 559896: easy way to understand permutation and combinations. \n" ); document.write( "
Algebra.Com's Answer #363552 by richard1234(7193)\"\" \"About 
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Permutation (nPr): number of ways to choose r objects from a collection of n, assuming that order matters\r
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\n" ); document.write( "\n" ); document.write( "Combination (nCr): number of ways to choose r objects from a collection of n, assuming that order doesn't matter\r
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\n" ); document.write( "\n" ); document.write( "Note the subtle \"difference\" between the two.
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