document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=357275>Question 357275</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How many distinguishable words can be formed from the letters of the word \"casserole\" if each letter is used exactly once?  If I told you the answer is 90,720; explain in your own words using complete sentences which formula you used and why (Permutations or Combinations),  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #255148 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=255148\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \r<BR>\n" );
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document.write( "Here there are 9 letters in which 's' is two times and 'e' is two times.\r<BR>\n" );
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document.write( "no. of ways to arrange m letters where some letter are repeated n, r, s,...times\r<BR>\n" );
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document.write( "= m!/ [(n!)(r!)(s!)........]\r<BR>\n" );
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document.write( "in this question m= 9, n= 2, r = 2\r<BR>\n" );
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document.write( "no. of ways = 9!/[2! * 2!] = 90720\r<BR>\n" );
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document.write( "here there is arrangement of letters in word, so we will use permutation.\r<BR>\n" );
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document.write( "9! is actually arrangement of 9 letters from 9 letters = 9P9 = 9!\r<BR>\n" );
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document.write( "Sometimes there may be typing mistake in solution of a problem, so please ignore it. Understand the concept and try to solve the problem yourself. If there is problem related to concept, contact at <BR>\n" );
document.write( "sudhanshu.cochin@yahoo.com or sudhanshu.cochin@gmail.com <BR>\n" );
document.write( "Best of luck....... </SPAN>\n" );
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