document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=45444>Question 45444</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0534465390/algebrahomeworkh>Finite math</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> For sets A and B, n(A union B) = 48,n(A)=35, and n(A intersection B)=12.  Find n(B). My answer is 13 but I'm not sure.  Thanks for checking. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #30175 by </B><A HREF=/tutors/aboutme.mpl?userid=venugopalramana><B>venugopalramana(3286)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=venugopalramana><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.geocities.com/venugopalramana/FREE_MATHS_ASSISTANCE.html valign=middle><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=30175\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> For sets A and B, n(A union B) = 48<BR>\n" );
document.write( "that is there are in all 48 elements in both A and B sets,counting repeat/common items once only<BR>\n" );
document.write( ",n(A)=35,<BR>\n" );
document.write( "that is there are 35 elements in A<BR>\n" );
document.write( " and n(A intersection B)=12.<BR>\n" );
document.write( "that is there are 12 elements common to both A and B<BR>\n" );
document.write( "if n(B)=x...then <BR>\n" );
document.write( "n(A u B)=35+x-12...since 12 are common to both A and B..hence<BR>\n" );
document.write( "48=35+x-12<BR>\n" );
document.write( "x=48+12-35=25<BR>\n" );
document.write( "n(B)=25\r<BR>\n" );
document.write( "\n" );
document.write( " Find n(B). My answer is 13 but I'm not sure. Thanks for checking. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );