Question

What would be the temperature
ag.
• 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?​

Answer 1

Answer :

1. Radhika's score = 20

Correct answers = 12×3 = 36

Incorrect answers marks = 20-36 = -16

Marks for 1 wrong answer = -2

No. of incorrect answers = -16÷-2 = 8

2.Marks scored by Mohini = -5

Marks obtained for 7 correct answers = 7 x 3 = 21

Marks obtained for incorrect answers = Total score - Marks obtained for 12 correct answers

= - 5 - 21 = -26

Marks obtained for 1 wrong answer = -2

Thus, number of incorrect answers = (-26) ÷ (-2) = 13

hope it helps