WBCS.LIVE practice question

There are 100 questions in a question paper, each carrying 2 marks. But there is a negative marking. 1 mark is deducted for each question answered incorrectly. A student answering all the questions got 80 marks. The number of questions correctly answered by him is

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 70
  2. 60
  3. 80
  4. 75

Correct answer and explanation

Correct answer: 60

Explanation: āœ… Correct Answer: B. 60 šŸ“š Explanation: Let the number of correct answers be 'x' and incorrect be 'y'. Since he answered all, (x + y = 100). The marks are (2x - y = 80). Adding the two equations: (3x = 180), so (x = 60). Therefore, the student answered exactly 60 questions correctly and 40 incorrectly on the paper.