document.write( "Question 1083797: Using the definition of permutations and combinations, solve for n in the following equation.\r
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Algebra.Com's Answer #697844 by ikleyn(52786) $\"\"$ $\"About$

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document.write( "n P 3 = n*(n-1)*(n-2).\r\n" );
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document.write( "n C 4 = .\r\n" );
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document.write( "So, your equation is \r\n" );
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document.write( "n*(n-1)*(n-2) = .\r\n" );
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document.write( "Simplify (by canceling the factors n*(n-1)*(n-2) in both sides)\r\n" );
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document.write( "1 = ,   or\r\n" );
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document.write( " = n-3  --->  n-3 = 12  --->  n = 15.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Answer. n = 15.\r
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