document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=404201>Question 404201</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How do you solve this permutation question?: n_P_4 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #285691 by </B><A HREF=/tutors/aboutme.mpl?userid=sudhanshu_kmr><B>sudhanshu_kmr(1152)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=sudhanshu_kmr><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=sudhanshu_kmr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=285691\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "nPr = n! / (n-r)! \r<BR>\n" );
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document.write( "where n! = n * (n-1) *..... 2*1<BR>\n" );
document.write( "example :   4! = 24<BR>\n" );
document.write( "      5! = 120\r<BR>\n" );
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document.write( "nP4 = n!/ (n-4)! <BR>\n" );
document.write( " </SPAN>\n" );
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