Question

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 got 12 correct answers, how many questions has she attempted incorrectly.
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Answer 1

Step-by-step explanation:

1) Radhika scored 12×3=36 marks. as 3 marks are for correct answer

final score of radhika is 20.

she got 16 marks negative. as −2 marks are for incorrect answer

therefore she made

2

16

=8 incorrect answer.

2) Mohini scored 7×3=21 marks. as 3 marks are for correct answer

final score of radhika is −5.

she got 26 marks negative. as −2 marks are for incorrect answer

therefore she made

2

26

=13 incorrect answer.

Answer 2

Answer:

Radhika scored 8 incorrect answers.

Step-by-step explanation:

A) Given:

3 marks are for correct answer

-2 marks are for incorrect answer

Therefore, Radhika gave 12 answers correct

=12*3=36

Final score of Radhika =20

Therefore, she scored 12 negative marks for each incorrect answer

=16/2=8

incorrect answer =8