Question

in a test, +3 marks are given for every correct answer and -1 mark are given for every incorrect answer.
Sona attempted all the questions and scored +20 marks though she got 10 correct answers.

How many questions were given in the test?
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Answer 1

Answer:

The Answer will be: 20

Step-by-step explanation:

(i) The total correct answer given by Sona 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