document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=448434>Question 448434</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A computer system requires users to have an access code that consists of a three-digit number that is not allowed to start with zero and cannot repeat digits. How many such codes are possible?<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 #308566 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=308566\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "for first position: 9 ways  (except 0)\r<BR>\n" );
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document.write( "for second position : 9 ways (except that  position first)\r<BR>\n" );
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document.write( "for third position : 8 ways  (except that position first and second)\r<BR>\n" );
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document.write( "number of possible codes = 9*9*8 = 648\r<BR>\n" );
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