document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=548939>Question 548939</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How many ways can a 3-people committee be chosen from 10 twins(20 people)? Restriction: No twins can both exist in this committee. (e.g Assume A & B are twins, if A is in the committee, B cannot be in.) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #467733 by </B><A HREF=/tutors/aboutme.mpl?userid=Macy101><B>Macy101(1)</B></A><img src=\"/images/stars/iconNewId_16x16.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Macy101><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=467733\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I believe this could be a wrong answer…\r<BR>\n" );
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document.write( "You're certain that 2 persons that are twins can NEVER be in the committee together. So actually, you can look at it as if those twins count as 1 person right? <BR>\n" );
document.write( "So this leaves us to choose 3 persons out of 10.\r<BR>\n" );
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document.write( "10!/( 3! * (10 - 3)!) = 120 </SPAN>\n" );
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