document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1049618>Question 1049618</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In an exam there is 4 marks for a right answer but 2 marks will be deducted for a wrong answer. A student attends 75 questions and gets 150 marks.How many questions did he answer right? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #665349 by </B><A HREF=/tutors/aboutme.mpl?userid=jorel555><B>jorel555(1290)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jorel555><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=665349\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let r be right answers, and w be wrong ones. Then:<BR>\n" );
document.write( "r+w=75<BR>\n" );
document.write( "4r-2w=150;<BR>\n" );
document.write( "2r+2w=150<BR>\n" );
document.write( "add these together, we get;<BR>\n" );
document.write( "6r=300<BR>\n" );
document.write( "r=50<BR>\n" );
document.write( "w=25<BR>\n" );
document.write( "There were 50 right answers, and 25 wrong. &#9786;&#9786;&#9786;&#9786; </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );