document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=973807>Question 973807</A>: <I><SPAN STYLE=\"word-break: break-all;\"> please solve-<BR>\n" );
document.write( "2.In a school there are total of 50 students in<BR>\n" );
document.write( "class X, who are divided in three sections A, B<BR>\n" );
document.write( "and C. Section A and B have equal no. of<BR>\n" );
document.write( "students. All the students of the class wrote a<BR>\n" );
document.write( "test. The average marks obtained by the<BR>\n" );
document.write( "section A and B together is 52.5. The average<BR>\n" );
document.write( "marks obtained by the section A and C together<BR>\n" );
document.write( "is 60. The average marks obtained by the<BR>\n" );
document.write( "section B and C together is 70. The average<BR>\n" );
document.write( "marks obtained by the students of sections A,<BR>\n" );
document.write( "B and C together is 60. How many Students are<BR>\n" );
document.write( "there in Section C.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #595869 by </B><A HREF=/tutors/aboutme.mpl?userid=JoelSchwartz><B>JoelSchwartz(130)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=JoelSchwartz><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=595869\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A=number of students in section A of class x<BR>\n" );
document.write( "B=number of students in section B of class x<BR>\n" );
document.write( "C=number of students in section C of class x<BR>\n" );
document.write( "A=B<BR>\n" );
document.write( "y=total marks for section A<BR>\n" );
document.write( "z=total marks for section B<BR>\n" );
document.write( "w=total marks for section C<BR>\n" );
document.write( "A+B+C=50<BR>\n" );
document.write( "2A+C=50<BR>\n" );
document.write( "Two times the number of students in section A plus the number of students in section C equals 50 students.<BR>\n" );
document.write( "(y+z)/2A=52.5<BR>\n" );
document.write( "The total points for section A and B divided by the number of students in section A plus B.<BR>\n" );
document.write( "(y+w)/(A+C)=60<BR>\n" );
document.write( "(z+w)/(B+C)=70<BR>\n" );
document.write( "(y+z+w)/(2A+C)=60\r<BR>\n" );
document.write( "\n" );
document.write( "y+z=105A<BR>\n" );
document.write( "(105A+w)/(2A+c)=60<BR>\n" );
document.write( "2A+C=50<BR>\n" );
document.write( "2A=50-C<BR>\n" );
document.write( "(105A+w)/50=60<BR>\n" );
document.write( "105A+w=3000<BR>\n" );
document.write( "w=3000-105A<BR>\n" );
document.write( "(y+3000-105A)/(50-A)=60<BR>\n" );
document.write( "y+3000-105A=3000-60A<BR>\n" );
document.write( "y=45A<BR>\n" );
document.write( "45A+z=105A<BR>\n" );
document.write( "z=60A<BR>\n" );
document.write( "(60A+3000-105A)/(50-A)=70<BR>\n" );
document.write( "-45A+3000=3500-70A<BR>\n" );
document.write( "25A=500<BR>\n" );
document.write( "A=20<BR>\n" );
document.write( "40+C=50<BR>\n" );
document.write( "C=10<BR>\n" );
document.write( "There are ten students in sections C.\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );