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. 6) 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:

6.1.let's Radhika attempted X incorrect answers.

So( 12×3)-2x=20

=36-2x=20

2x=36-20

2x=16

X=16/2

X=8

Hence Radhika attempted 8 incorrect answers.

6.2.lets Radhika attempted X incorrect answers.

So correct answers - incorrect answers=5

7*3-2x=5

21-2x=5

2x=21-5

2x=16

X=16/2

X=8.

Hence Radhika attempted 8 incorrect answers.