Question

In a test each correct answer +3 marks and incorrect answer -1 mark, sonali attempted all questions and scored +20 marks then find i)how many incorrect answers did she attempt
ii)how many questions were given in test​

Answer 1

Answer:

The total correct answer given by Sonali was 10 but she obtained 20 marks.

∵ 1 correct answer of 3 marks then

Marks cut for the incorrect answer =20−10×3=20−30=−10

From question, −1 mark is given for every incorrect answer.

Hence, total incorrect answers =

−1

−10

=10

(ii) Total correct answer given =10

Ans from part (i) we know that,

Total incorrect answer given =10

Therefore, the total question asked in the test (examination)=10+10=20

Answer 2

Answer:

1) 10

2)20

Step-by-step explanation:

I hope it's help you