document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=725586>Question 725586</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The average age of a group of 20 boys is increased by one year when 5 of them whose average age was 20 years are replaced by 5 new boys. The average age of new comers is </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #444215 by </B><A HREF=/tutors/aboutme.mpl?userid=god2012><B>god2012(113)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=god2012><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=god2012><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=444215\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Solution:\r<BR>\n" );
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document.write( "Let 'x' be the sum of ages of first 20 boys.<BR>\n" );
document.write( "Let 'y' be the sum of ages of 5 old boys and<BR>\n" );
document.write( "'z' be the sum of ages of 5 new boys.\r<BR>\n" );
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document.write( "Given : y/5 = 20 or y = 100 \r<BR>\n" );
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document.write( "(x - y  + z) / 20 = 1 + (x/20)\r<BR>\n" );
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document.write( "(x-100 +z)/20  = (x/20) + 1\r<BR>\n" );
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document.write( "or z/20 = 6 or Z = 120<BR>\n" );
document.write( "Average of 5 new comers = Z / 5 = 120 / 5 = 24 years </SPAN>\n" );
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