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In an examination, 120 questions were asked. As there was negative marking, Reena decided not to attempt 15 questions. Each question carries 2 marks. 80% of her answers were correct. For a wrong answer 1 mark is deducted. How many marks were obtianed by Reena in the examination?
  • a)
    140
  • b)
    147
  • c)
    152
  • d)
    168
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
In an examination, 120 questions were asked. As there was negative mar...
Calculation:
In the exam total questions = 120
Now, she didn't attempt 15 question, so her total attempts = (120 - 15) = 105
Here, 80% of her attempted questions were correct, so total correct questions = (105 × 80/100) = 84, incorrect attempt = 21
So, total marks obtained by Reena = (84 × 2) - 21 = 147
∴ The correct answer is 147
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