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.
(i) How many incorrect answers has she attempted?
(ii) How many questions were given in the test?​

Answer 1

Step-by-step explanation:

total correct answers=10

marks for correct answer=10*3=30

total marks=20

so marks for incorrect answer=30-20=10

I) total incorrect answers=10

ii) total question in test= total correct+ total incorrect answers=10+10=20