Question 16

In an exam of 80 questions, a correct answer is given +1 mark, a wrong answer is given —1 mark, and if a question is not attempted there are zero marks. If a student attempted only 80% of the questions and got 32 marks, then how many questions did he answer correctly?

Solution

Attempted questions = 80 $$\times \frac{80}{100}$$ = 64
Marks got = 32

Marks deduct = 64 - 32 = 32

So, Wrong answer = 32/2 = 16

So, Correct answer = 32 + 16 = 48

$$\therefore$$ The correct answer is option B.

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