document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=751963>Question 751963</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In an examination a student scores 1 mark for each correct answer and 0.25marks are deducted for each wrong answer. If he attempts all 120 questions and secures 90 marks the number of question he attempts correctly is? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #457483 by </B><A HREF=/tutors/aboutme.mpl?userid=tommyt3rd><B>tommyt3rd(5050)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=tommyt3rd><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=tommyt3rd><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=457483\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Assuming 90 marks is a score (and not a percentage)\r<BR>\n" );
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document.write( "R-right answers<BR>\n" );
document.write( "W-wrong\r<BR>\n" );
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document.write( "Total questions: R+W=120\r<BR>\n" );
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document.write( "Score: R-0.25W=90\r<BR>\n" );
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document.write( "System\r<BR>\n" );
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document.write( "R+W=120<BR>\n" );
document.write( "R-0.25W=90\r<BR>\n" );
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document.write( "Subtracting equations leads to\r<BR>\n" );
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document.write( "(R+W)-(R-0.25W)=120-90\r<BR>\n" );
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document.write( "then\r<BR>\n" );
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document.write( "1.25W=30\r<BR>\n" );
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document.write( "W=24\r<BR>\n" );
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document.write( "so that R=120-24=96\r<BR>\n" );
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document.write( "96 correct\r<BR>\n" );
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document.write( ":) </SPAN>\n" );
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