In a test, +4 marks are given for every correct answer and –1 mark are given for every incorrect answer.
i) Ravi attempted all the questions and scored +30 marks though he got 10 correct answers. How many incorrect answers has she attempted?
ii) Sameera scored -12 marks. She got 16 incorrect answers. How many correct answers has she attempted?
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Ravi : attempted 10 incorrect ans
&
Sameera : attempted 1 correct ans.
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