Question

uculenpeidu alus
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 scores
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 answer
How many questions has she attempted incorrectly?​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Step-by-step explanation:

(i)Radhika scores mark=20

Correct answers=12

Scores of 12 correct answers=12 X 3 =36

Questions she has attempted=(36-20)/2

(As 2 Mark's cut off for each wrong answer)

=(36-20)/2

=16/2

=8

*12 correct answers + 8 wrong answers = 20 attempted questions.*

(ii)Mohini got correct answers = 7

Marks of corrected questions = 7 X 3 = 21

But got Marks = 5

Difference = 21-5 = 16

Marks cut off for each wrong questions = 2

Total no. of wrong questions = 16/2 = 8

*She has attempted 8 wrong answers.*