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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If she attempted 10 correct answer the marks will be for
10 correct answer = 3 x 10 = 30 marks
As she scored 20
Incorrect answer = 30 -20 = 10 mark or
10 questions were incorrect
and Total number of questions are 20
utkarsh2244:
in which class you study
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