Question

5) 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?
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Answer 1

Answer:

Step-by-step explanation:

I hope this will help you :)

Please mark me as the brainliest

Answer 2

Answer:

(i)incorrect =10

(ii)total questions=20

Step-by-step explanation:

(i) correct questions=10

marks for right answer=+3

total marks for right answers=10*3=30

marks scored by sonia=20

let incorrect answers be x

=>marks scored by sonia by correct answers+incorrect answers=total marks

=20 +x=30

=>x=-10

incorrect =-10 marks

marks for every incorrect=-1

total incorrect=10 questions

(ii) total questions=correct questions + incorrect answers

=>10+10=20 questions

Hope this helps you