In an examination, a student scores 4 marks for every correct answer and loses 1 mark for every wrong answer. If he attempts all 80 questions and secures 120 marks, the number of questions he attempts correctly, is:	Choose the correct choice from the following answers: A) 35 B) 46 C) 42 D) 30 E) 40
Let the number of correct answers be x.   Number of incorrect answers = (80 â€“ x).   4x â€“ 1(80 â€“ x) = 120 or 5x = 200 or x = 40.   ANSW40R:40
<result>E</result>
In an examination, a student scores 4 marks for every correct answer and loses 1 mark for every wrong answer. If he attempts all 80 questions and secures 120 marks, the number of questions he attempts correctly, is: