In an examination, a student scores 3 marks for every correct answer and loses 2 marks for every wrong answer. If he attempts all 100 questions and secures 300 marks, the number of questions he attempts correctly, is:
Answers:
A) 150  B) 250  C) 400  D) 300  E) 100
Let the number of correct answers be x.   Number of incorrect answers = (100 â€“ x).   3x â€“ 2(100 â€“ x) = 300 or 5x = 500 or x = 100.   ANSW100R:100
<result>E</result>
In an examination, a student scores 3 marks for every correct answer and loses 2 marks for every wrong answer. If he attempts all 100 questions and secures 300 marks, the number of questions he attempts correctly, is: