document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=278532>Question 278532</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A PIN code has 3 letters. How many different PIN codes are possible if 3 of the same letter are not allowed (like AAA), but two of the same are allowed (AAB,ABA and BAA)? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #202670 by </B><A HREF=/tutors/aboutme.mpl?userid=nyc_function><B>nyc_function(2741)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nyc_function><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=nyc_function><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=202670\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let's use AAB.\r<BR>\n" );
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document.write( "3P3 = 3!/(3 - 3)!\r<BR>\n" );
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document.write( "3P3 = 6/0!\r<BR>\n" );
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document.write( "3P3 = 6/1\r<BR>\n" );
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document.write( "3P3 = 6 different PIN codes are possible.\r<BR>\n" );
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document.write( "Or you can do it the long way.\r<BR>\n" );
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document.write( "AAB becomes AA, AB, BA = 2 letters + 2 letters + 2 letters = 6 letters or PINS. </SPAN>\n" );
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