Question

6. 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. (1) 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?​

Answer 1

Answer:

(1) 20 questions has Radhika attempted incorrectly

(2) 13 questions has Mohini attempted incorrectly

Step-by-step explanation:

(1) Radhika scored 20 marks.

she has got 12 correct answers so 20 × 3 = 60 marks

x number of questions she uncorrected whose marks

= 20 - 60 = - 40

Number of question = -40/ -2 = 20

ii) Mohini scores-5 marks in this test

she has got 7 correct answers so 7 × 3 = 21

x number of questions she uncorrected whose marks

= -5 - 21 = -26

Number of question = -26 / -2 = 13