Question

There were 25 questions in the examination written by Jafar. Each correct answer gets 2 marks. There is a loss of mark for each wrong answer. Jafar answered all the questions. He got 35 marks. Find out the number of correct answers?

Answer 1

Let the number of correct answers = x

Total number of questions = 25

No. of wrong answers = 25 – x 

Marks for correct answers = 2x

marks losses for wrong answers = 25

ie. 2x – (25 – x) = 25

2x – 25 + x = 35

3x = 60

x = \(\frac{60}{3}\) = 20,

∴ number of correct answers = 20.