document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=921163>Question 921163</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a class there are 22 girls and 38 boys. The mean score of girls in an examination is 78 and the mean score of boys is 71. What is the mean score of the entire class ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #558754 by </B><A HREF=/tutors/aboutme.mpl?userid=srinivas.g><B>srinivas.g(540)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=srinivas.g><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=srinivas.g><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=558754\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> sum of scores of all boys  = no of boys * mean score of boys <BR>\n" );
document.write( "                            = 38*71<BR>\n" );
document.write( "                            =2698<BR>\n" );
document.write( "sum of scores of all girls  = no of girls * mean score of girls <BR>\n" );
document.write( "                            = 22*78<BR>\n" );
document.write( "                            =1716<BR>\n" );
document.write( "total   =2698+1716 =4414<BR>\n" );
document.write( "mean = total / total no of boys girls <BR>\n" );
document.write( "       =4414/(22+38)<BR>\n" );
document.write( "       =4414/60<BR>\n" );
document.write( "       =73.567<BR>\n" );
document.write( "mean score of entire class  = 73.567  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );