document.write( "Question 127037: If there are 20 people in a room, and each person shakes hands with everyone exactly once, how many handshakes will there be?\r
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Algebra.Com's Answer #93056 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
19C2 = 19*18/1*2 = 19*9 = 171
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\n" ); document.write( "You can see this pattern if you try it with
\n" ); document.write( "2 people = 2C2 = 1 handshake
\n" ); document.write( "3 people = 3C2 = 3 handshakes
\n" ); document.write( "4 people = 4C2 = 6 handshakes
\n" ); document.write( "5 people = 5C2 = 10handshakes
\n" ); document.write( "etc.
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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