document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=127037>Question 127037</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If there are 20 people in a room, and each person shakes hands with everyone exactly once, how many handshakes will there be?\r<BR>\n" );
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document.write( "Thanks for the help. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #93047 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=93047\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> each of the 20 people shakes hands with 19 other people __ 20*19=380\r<BR>\n" );
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document.write( "BUT ... Sam shaking hands with Sue is the same as Sue shaking hands with Sam<BR>\n" );
document.write( "__ so half of the handshakes are duplicates\r<BR>\n" );
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document.write( "(20*19)/2=190 </SPAN>\n" );
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