document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1157604>Question 1157604</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Formula : nPn/a!b!c!<BR>\n" );
document.write( "I don't understand the formula<BR>\n" );
document.write( "In what condition and how can I use this formula <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #780476 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52864)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=780476\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .\r<BR>\n" );
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document.write( "It is the formula for the number of all distinguishable arrangements of n items,\r<BR>\n" );
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document.write( "when there are \"a\" indistinguishable items of one type; \"b\" indistinguishable items of the other type; <BR>\n" );
document.write( "and \"c\" indistinguishable items of the third type among these \"n\" items.\r<BR>\n" );
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document.write( "You may find many examples (TEMPLATES) of solved problems of this type in the lesson\r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;- <A  rel=nofollow HREF=https://www.algebra.com/algebra/homework/Permutations/Arranging-elements-of-sets-containing-undistinguishable-elements.lesson>Arranging elements of sets containing indistinguishable elements</A> \r<BR>\n" );
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document.write( "in this site.\r<BR>\n" );
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document.write( "The lesson was specially created to present you this special class of permutation problems, and to show <BR>\n" );
document.write( "the method of solution to these problems.\r<BR>\n" );
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document.write( "Read it, and after reading many things will become more clear to you.\r<BR>\n" );
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document.write( "Also, &nbsp;you have this free of charge online textbook in ALGEBRA-II in this site\r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;- <A  rel=nofollow HREF=https://www.algebra.com/algebra/homework/complex/ALGEBRA-II-YOUR-ONLINE-TEXTBOOK.lesson>ALGEBRA-II - YOUR ONLINE TEXTBOOK</A>.\r<BR>\n" );
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document.write( "The referred lesson is the part of this online textbook under the topic &nbsp;\"<U>Combinatorics: Combinations and permutations</U>\". \r<BR>\n" );
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document.write( "Save the link to this textbook together with its description\r<BR>\n" );
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document.write( "Free of charge online textbook in ALGEBRA-II<BR>\n" );
document.write( "https://www.algebra.com/algebra/homework/complex/ALGEBRA-II-YOUR-ONLINE-TEXTBOOK.lesson\r<BR>\n" );
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document.write( "into your archive and use when it is needed.\r<BR>\n" );
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