document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=772436>Question 772436</A>: <I><SPAN STYLE=\"word-break: break-all;\"> if 35 students average 80% and 15 average 70% what is the total average of all 50 students? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #470886 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=470886\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The lesson here is that you can't get an average<BR>\n" );
document.write( "by taking the average of 2 averages. You must <BR>\n" );
document.write( "use the formula:<BR>\n" );
document.write( "Average = ( sum of all the scores ) / ( total number of students )<BR>\n" );
document.write( "--------------------------<BR>\n" );
document.write( "Use the formula:<BR>\n" );
document.write( "Average = ( sum of scores ) / ( number of students )<BR>\n" );
document.write( "Sum of scores = ( Average )*( number of students )<BR>\n" );
document.write( "-------------------------------------------<BR>\n" );
document.write( "1st sum of scores = <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.8%2A35++=+28+ ALIGN=MIDDLE  ALT=\"+.8%2A35++=+28+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "2nd sum of scores:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.7%2A15+=+10.5+ ALIGN=MIDDLE  ALT=\"+.7%2A15+=+10.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "----------------<BR>\n" );
document.write( "Number of students is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+35+%2B+15+=+50+ ALIGN=MIDDLE  ALT=\"+35+%2B+15+=+50+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "----------------<BR>\n" );
document.write( "Average = ( sum of all the scores ) / ( total number of students )<BR>\n" );
document.write( "Average = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+28+%2B+10.5+%29+%2F+50+ ALIGN=MIDDLE  ALT=\"+%28+28+%2B+10.5+%29+%2F+50+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Average = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+38.5%2F50+=+.77+ ALIGN=MIDDLE  ALT=\"+38.5%2F50+=+.77+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The average for the 50 students is 77%<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );