document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=370097>Question 370097</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Given |A| = |B| = |C| = 80,  |A INT B| = 25,<BR>\n" );
document.write( "  |B INT C| = 30,  |A INT B INT C| = 15, and<BR>\n" );
document.write( "  |A  UNION  B  UNION  C| = 175 elements.\r<BR>\n" );
document.write( "\n" );
document.write( "  |A INT C| = ?<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 #263879 by </B><A HREF=/tutors/aboutme.mpl?userid=robertb><B>robertb(5830)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=robertb><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=robertb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=263879\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Use the formula:<BR>\n" );
document.write( "|A U B U C| = |A| + |B| + |C| -|AB|- |BC| - |AC| + |ABC|.  Substitute:<BR>\n" );
document.write( "175 = 80+80+80-25-30-|AC|+15,<BR>\n" );
document.write( "-25 = -|AC|, or<BR>\n" );
document.write( "|AC| = 25. </SPAN>\n" );
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