Discussion of Question with ID = 014 under Basic-Simplification

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Question

A candidate attempts 120 questions and gets a score of 170. How many questions did he attempt wrongly, if 4 marks are awarded for a correct answer, and 1 is deducted for a wrong answer?

A

62.

B

63.

C

61.

D

64.

Soln.
Ans: a

Had he attempted all correctly, he would have got 120 × 4 = 480. But he has lost 480 - 170 = 310 marks due to wrong attempts. Each wrong attempt leads to an overall loss of 5 marks, so the number of wrong attempts is 310/5 = 62.


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