In a class test (+3) marks are given for every correct answer and (- 2) marks are given for every incorrect answer and no marks for not attempting any question.

**(i)** Radhika scored 20 marks. If she has got 12 correct answers, how many questions has she attempted incorrectly?

**(ii)** Mohini scores – 5 marks in this test, though she has got 7 correct answers. How many questions has she attempted incorrectly ?

Marks for correct answer = 3

Marks for incorrect answer = (-2)

Number of correct answer = 12

a = number of correct answer

12 X 3 + (-2) x a = 20

36 + (-a) = 20

36 - 20 = (-a)

36 - 20 = 16

Therefore number of incorrect answer are = 16

~The Brain…