document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=284719>Question 284719</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The average age of the 40 members of a computer science camp is 17 years. There are 20 girls, 15 boys, and 5 adults. If the average age of the girls is 15 and the average age of the boys is 16, what is the average age of the adults?\r<BR>\n" );
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document.write( "(A) 26 (B) 27 (C) 28 (D) 29 (E) 30 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #206543 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=206543\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 20 girls avg age =15\r<BR>\n" );
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document.write( "15 boys avg age =16 \r<BR>\n" );
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document.write( "Total 40 avg age = 17\r<BR>\n" );
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document.write( "Let the average age of adults be x.  5 adults\r<BR>\n" );
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document.write( "Total age of all students / total students = 17\r<BR>\n" );
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document.write( "5x+15*16+20*15 / 40 = 17\r<BR>\n" );
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document.write( "5x+240+300=40*17\r<BR>\n" );
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document.write( "5x+540=680\r<BR>\n" );
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document.write( "5x=680-540\r<BR>\n" );
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document.write( "5x=140\r<BR>\n" );
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document.write( "x= 140/5\r<BR>\n" );
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document.write( "x= 28\r<BR>\n" );
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document.write( "The average age of adults = 28\r<BR>\n" );
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document.write( " </SPAN>\n" );
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