document.write( "Question 1005265: A test contains 200 multiple choice questions. The marking rule is designed such that 2 marks are awarded for each correct answer and 1 mark deducted for each wrong answer. If there are N questions answered correctly by a student, find their final score in terms of N.\r
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Algebra.Com's Answer #621687 by macston(5194)![]() ![]() You can put this solution on YOUR website! . \n" ); document.write( "If the student answers all of the questions: \n" ); document.write( ". \n" ); document.write( "N=number correct \n" ); document.write( "2N=points for correct answers \n" ); document.write( "200-N=number incorrect \n" ); document.write( "Points deducted for incorrect=-1(200-N)=-200+N \n" ); document.write( "F=final score \n" ); document.write( "F=2N-200+N \n" ); document.write( "F=3N-200 \n" ); document.write( "This looks strange, but consider: \n" ); document.write( "When he starts, the student has no correct answers, so he loses \n" ); document.write( "1 point for all questions (-200). For each question he answers \n" ); document.write( "correctly (N), he gets 2 points and also does not lose a point \n" ); document.write( "for being incorrect (thus 3 points for each correct answer, or (3N)). \n" ); document.write( " |