document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=721137>Question 721137</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a science test, a class of 30 students had an average of 80. The 20 girls in the class had an average of 85. What is the average of the 10 boys in the class? <BR>\n" );
document.write( "A) 60 <BR>\n" );
document.write( "B) 70 <BR>\n" );
document.write( "C) 80 <BR>\n" );
document.write( "D) 85 <BR>\n" );
document.write( "E) 90 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #442232 by </B><A HREF=/tutors/aboutme.mpl?userid=KMST><B>KMST(5328)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=KMST><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=KMST><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=442232\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> For <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=n ALIGN=MIDDLE  ALT=\"n\"   DISABLED_style= \"max-width:90%; height:auto;\" > scores <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=average=sum%2Fn ALIGN=MIDDLE  ALT=\"average=sum%2Fn\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "For the <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=20 ALIGN=MIDDLE  ALT=\"20\"   DISABLED_style= \"max-width:90%; height:auto;\" > girls the sum of the scores was <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sum%5Bg%5D ALIGN=MIDDLE  ALT=\"sum%5Bg%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" > and<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=85=sum%5Bg%5D%2F20 ALIGN=MIDDLE  ALT=\"85=sum%5Bg%5D%2F20\"   DISABLED_style= \"max-width:90%; height:auto;\" > --> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sum%5Bg%5D=85%2A20=1700 ALIGN=MIDDLE  ALT=\"sum%5Bg%5D=85%2A20=1700\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "For the class, the sum of the <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=30 ALIGN=MIDDLE  ALT=\"30\"   DISABLED_style= \"max-width:90%; height:auto;\" > scores is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sum%5Bc%5D ALIGN=MIDDLE  ALT=\"sum%5Bc%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" >,<BR>\n" );
document.write( "and the average is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=80 ALIGN=MIDDLE  ALT=\"80\"   DISABLED_style= \"max-width:90%; height:auto;\" >=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sum%5Bc%5D%2F30 ALIGN=MIDDLE  ALT=\"sum%5Bc%5D%2F30\"   DISABLED_style= \"max-width:90%; height:auto;\" > --> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sum%5Bc%5D=80%2A30=2400 ALIGN=MIDDLE  ALT=\"sum%5Bc%5D=80%2A30=2400\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Since <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sum%5Bc%5D ALIGN=MIDDLE  ALT=\"sum%5Bc%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" > is the sum of the boys' scores, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sum%5Bb%5D ALIGN=MIDDLE  ALT=\"sum%5Bb%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" > ,<BR>\n" );
document.write( "plus the sum of the girls' scores<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sum%5Bb%5D%2B1700=2400 ALIGN=MIDDLE  ALT=\"sum%5Bb%5D%2B1700=2400\"   DISABLED_style= \"max-width:90%; height:auto;\" > --> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sum%5Bb%5D=2400-1700 ALIGN=MIDDLE  ALT=\"sum%5Bb%5D=2400-1700\"   DISABLED_style= \"max-width:90%; height:auto;\" > --> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sum%5Bb%5D=700 ALIGN=MIDDLE  ALT=\"sum%5Bb%5D=700\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The average for the boys is the sum of their scores divided by the number of boys:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=700%2F10=highlight%2870%29 ALIGN=MIDDLE  ALT=\"700%2F10=highlight%2870%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );