document.write( "Question 1193865: Determine the number of combinations of 20 things, taken four(4) at a time \n" ); document.write( "

Algebra.Com's Answer #825915 by Edwin McCravy(20055) $\"\"$ $\"About$

You can put this solution on YOUR website!

\r\n" );
document.write( "Start with 20, go down 1 at a time multiplying until you have 4 factors\r\n" );
document.write( "on top.\r\n" );
document.write( "\r\n" );
document.write( "Then there are also 4 factors on the bottom, starting with 4, going down 1\r\n" );
document.write( "at a time until you have 4 factors on the bottom. \r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "like this:\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Then figure that out.\r\n" );
document.write( "\r\n" );
document.write( "Edwin

\n" ); document.write( "

\n" );