Question

In an examination, a student scores 4 marks for every correct answer and loses 1 mark for every wrong answer. If he attempts all 75 questions and secures 125 marks, the number of questions he attempted correctly, is

• A. 35
• B. 40
• C. 42
• D. 46

Answer 1

The correct option is B 40

If the number of correct answer be x, then
the number of incorrect answer is $(75-x)$.
$\therefore 4x-(75-x)=125orx=40$