Question

in a competitive examination 5 mark is awarded in every correct answer, 2 marks are deducted for every wrong answer and 0 mark is given not answering the question. find the score of boy who attempt 20 questions and 12 answers are correct. ​

Answer 1

The score of a boy whose 12 answers are correct would be

$20 \times 12 = 240$

But, marks for 12 incorrect answers are deducted from 240

$8 \times 12 = 108$

$120 - 108 = 12$

So, he obtains $240-12 = 228$ marks.