document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1060729>Question 1060729</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If n(A&#8746;B)=52,n(A&#8745;B)=10, and n(A)=n(B), find n(A).<BR>\n" );
document.write( "A. 31<BR>\n" );
document.write( "B. 21<BR>\n" );
document.write( "C. 5<BR>\n" );
document.write( "D. 26 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #675671 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52796)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=675671\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "It is clear and widely well known that n(A U B) = n(A) + n(B) - n(A n B).\r<BR>\n" );
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document.write( "For the given case, it implies that 52 = 2*n(A) - 10, or\r<BR>\n" );
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document.write( "n(A) = 31.\r<BR>\n" );
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document.write( "Solved.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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