document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=548287>Question 548287</A>: <I><SPAN STYLE=\"word-break: break-all;\"> From the ten books that you´ve recently bought but not read, you plan to take four with you on vacation. How many different sets of four books can you take? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #356866 by </B><A HREF=/tutors/aboutme.mpl?userid=mathie123><B>mathie123(224)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mathie123><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=356866\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Okay so we have a total of n=10 books and we want to choose 4 of them to bring with us.   Order does not matter (it doesn't matter what order you picked the books, only that you picked them) so we are dealing with combinations .  Therefore there are <BR>\n" );
document.write( "10C4 different sets.  This can be simplified using the combinations formula, but I will leave that part up to you:) \r<BR>\n" );
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document.write( "Let me know if you are still unsure.   </SPAN>\n" );
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