document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=815463>Question 815463</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The average age of a group went up by 2 years when a man aged 34 years was replaced by an old man aged 58 years How many members were there in the group?<BR>\n" );
document.write( "(A)10<BR>\n" );
document.write( "(B)12<BR>\n" );
document.write( "(C)18<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #491108 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=491108\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The average age of a group went up by 2 years when a man aged 34 years was replaced by an old man aged 58 years<BR>\n" );
document.write( " How many members were there in the group?<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Let n = number of men in the group, assume they are all 34 yrs old<BR>\n" );
document.write( ":<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28%2834%28n-1%29%2B58%29%29%2Fn ALIGN=MIDDLE  ALT=\"%28%2834%28n-1%29%2B58%29%29%2Fn\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 34 + 2<BR>\n" );
document.write( "34(n-1) + 58 = 36n<BR>\n" );
document.write( "34n - 34 + 58 = 36n<BR>\n" );
document.write( "24 = 36n - 32n<BR>\n" );
document.write( "24 = 2n<BR>\n" );
document.write( "n = 12 members in the group<BR>\n" );
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document.write( "</TD></TR></TABLE>\n" );