document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=549874>Question 549874</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Thirty-six students took a final exam on which the passing score was 70.  The mean of those who passed was 78, the mean score of those who failed was 60, and the mean of all scores was 71. How many students did not pass the exam? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #358433 by </B><A HREF=/tutors/aboutme.mpl?userid=mathstutor458><B>mathstutor458(57)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mathstutor458><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=358433\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Total number of students are 36.<BR>\n" );
document.write( "number of students who passed in the exam, let us say 'x'.<BR>\n" );
document.write( "number of students who didnt passed in the exam is 36-x.<BR>\n" );
document.write( "The mean of those who passed was 78<BR>\n" );
document.write( "the mean score of those who failed was 60<BR>\n" );
document.write( "the mean of all scores was 71.<BR>\n" );
document.write( "Therefore,78x+60(36-x)=71*36<BR>\n" );
document.write( "        =>18x=36(71-60) => 18x=36*11 =>x=22 members paased the exam\r<BR>\n" );
document.write( "\n" );
document.write( "Remaining 14 members didnt pass the exam. so, the answer is 14.<BR>\n" );
document.write( " <BR>\n" );
document.write( " </SPAN>\n" );
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