document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1186668>Question 1186668</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If p={1,2,3.4},Write down all the subsets of p which have exactly two element </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #817621 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13203)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=817621\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "You need to choose 2 of the 4 elements; the number of ways you can do that is \"4 choose 2\" = C(4,2) = 6.<br><BR>\n" );
document.write( "You can make the list; it should have 6 different subsets.<br><BR>\n" );
document.write( "To make sure you don't count any subset twice, make sure each subset you write has the smaller of the two elements first -- that is, for example, you don't want to have two different subsets {2,4} and {4,2}, because those are the same.<br><BR>\n" );
document.write( "Or of course you could make sure that in each subset you list the larger of the two numbers is first....<br><BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );