Question

in a class test +3 marks are given for a correct answer and (-2) are given for every incorrect answer and no marks for not attempting any question
(i) Radikha score 20 marks.if she got 12 correct answers how many questions has she attempted correctly?
(ii) mohini scores ( -5) in this test though she has got 7 correct answers. how many questions has she attempted incorrectly?
(iii) rakesh scores 18 marks by attempting 16 questions.how many has he attempted correctly and how many questions has he attempted incorrectly?​

Answer 1

Answer:

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.