document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=984869>Question 984869</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the mean age of 10 people is 15. When another person joins the group, the mean age goes down to 14. How old os the new person?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #605732 by </B><A HREF=/tutors/aboutme.mpl?userid=macston><B>macston(5194)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=macston><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=macston><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=605732\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The sum of the ages of the original group was <BR>\n" );
document.write( "(Number of people)x(average(mean))=(10)(15)=150 years<BR>\n" );
document.write( "Adding one person, the sum to have a mean of 14 is <BR>\n" );
document.write( "(Number of people)x(average(mean))=(14)(11)=154 years<BR>\n" );
document.write( "154 years-150 years=4 years<BR>\n" );
document.write( "ANSWER The 11th person was 4 years old. </SPAN>\n" );
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