document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=411257>Question 411257</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A reading list contains 20 articles. How many ways are there to choose 3 articles from the list? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #289120 by </B><A HREF=/tutors/aboutme.mpl?userid=rfadrogane><B>rfadrogane(214)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rfadrogane><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=rfadrogane><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=289120\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A reading list contains 20 articles. How many ways are there to choose 3 articles from the list?<BR>\n" );
document.write( "Sol'n:<BR>\n" );
document.write( "This problem is involving a combination, <BR>\n" );
document.write( "so,N = nCr = n!/(n-r)!r!<BR>\n" );
document.write( " n=20, r=3<BR>\n" );
document.write( "N =C(20,3)= 1,140 ways ----answer\r<BR>\n" );
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document.write( "^_^ </SPAN>\n" );
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