Question

. In a test, +3 marks are given for every correct answer and –1 mark is 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

Answer:

correct answers=+3marks

wrong answers=-1mark

sona scored 20 Marks with 10 correct answers

1)total score=20

correct answers=10

Mark's for correct answers=10×3=30

marks for incorrect answers=total score - Mark's for correct answer

=20-30=-10

incorrect answers= -10/-1=10

therefore she got 10 incorrect answers

2)correct answers=10

incorrect answers=10

total answers =20

therefore 20 questions were asked in the test