Question

An examination has 10 questions. Each correct answer gets 1 mark, and for each wrong answer $\frac{1}{2}$ a mark gets reduced. If Anu got 3 answers right, and 7 answers wrong, what would be her total marks?

• A. $\frac{-1}{2}$
• B. $\frac{9}{2}$
• C. $\frac{1}{2}$
• D. $\frac{-1}{8}$

Answer 1

The correct option is A

$\frac{-1}{2}$

For 3 correct answers, she would get 3 marks. and for 7 wrong answers, she would get negative of half of 7, that is $-3\frac{1}{2}$.

Total marks scored

$=3-3\frac{1}{2}$

$=3-3-\frac{1}{2}$

$=-\frac{1}{2}$