Question

in a test +3 marks are given for correct answer and -1 marks for incorrect answer..soma attemped all questions and scored +20 marks though she got 10 correct answer
Questions
i) how many incorrect answers she attemped
ii) how many Mark's where given in test...​

Answer 1

Answer:

(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 = 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