In an examination, a student scores 4 marks for every correct answer and loses 1mark for every wrong answer. If he attempts all 200 questions and secures 240 marks, the number of questions he attempts incorrectly, is:	Pick one.
A) 135
B) 200
C) 140
D) 112
E) 48
Let the number of correct answers be x.   Number of incorrect answers = (200 â€“ x).   4x â€“ (200 â€“ x) = 240 or 5x = 440 or x = 88.   Number of incorrect answers=200-88= 
<gadget id="calculator">200-88</gadget>
<output>112</output>
112   ANSWER:112
<result>D</result>
In an examination, a student scores 4 marks for every correct answer and loses 1mark for every wrong answer. If he attempts all 200 questions and secures 240 marks, the number of questions he attempts incorrectly, is: