2020 · Q111
In an exam, a candidate attempts 20 questions and scores 72 marks. If 5 marks are awarded for each correct answer and 2 marks are deducted for each wrong answer, then how many questions were answered correctly by him?
general-mental-abilityquantitative-aptitude
- A18
- B17
- C16
- D15
Explanation
Let x be the number of correct answers: 5x − 2(20−x) = 72, i.e. 7x = 112, so x = 16. The other options do not satisfy the marks equation.