document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=761742>Question 761742</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 4.	How many 3-letter code words are possible using the first 8 letters of the alphabet if<BR>\n" );
document.write( "a)	No letter can be repeated ?<BR>\n" );
document.write( "b)	Letters can be repeated ?<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #463544 by </B><A HREF=/tutors/aboutme.mpl?userid=ramkikk66><B>ramkikk66(644)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ramkikk66><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=463544\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Using ABCDEFGH\r<BR>\n" );
document.write( "\n" );
document.write( "a) If no letter can be repeated:<BR>\n" );
document.write( "First letter of he 3 letter combo can be chosen in 8 ways.<BR>\n" );
document.write( "Second letter can be chosen only in 7 ways (because you can't repeat the 1st letter)<BR>\n" );
document.write( "Third letter can be chosen in 6 ways.<BR>\n" );
document.write( "So, total number of combinations = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8%2A7%2A6+=+336 ALIGN=MIDDLE  ALT=\"8%2A7%2A6+=+336\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "b) If letters can be repeated, each letter of the combination can be chosen in 8 ways, so the number of combinations is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8%2A8%2A8+=+512 ALIGN=MIDDLE  ALT=\"8%2A8%2A8+=+512\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( ":) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );