document.write( "Question 1186044: What is the value of 12C2? \n" ); document.write( "

Algebra.Com's Answer #817089 by ikleyn(52781) $\"\"$ $\"About$

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document.write( "For nC2, there is a simple and compact formula  \r\n" );
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document.write( "    nC2 =  = .\r\n" );
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document.write( "In your case,  12C2 =  =  = 6*11 = 66.\r\n" );
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document.write( "It is highly recommended for any student to know and to use this simple formula,\r\n" );
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document.write( "alongside with the long formulas for the general case.\r\n" );
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document.write( "Using the short compact formula will allow you to save huge amount of your time and avoid numerous errors,\r\n" );
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document.write( "which you DEFINITELY and INEVITABLY will make, using long formulas without any visible benefits.\r\n" );
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