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Mathematics, 15.06.2021 19:30 chloeboo
In a test, +3 marks are given for every correct answer and -1 are given for every incorrect answer (i) Sona scored +20 marks though she got 10 correct answers. How many incorrect answers has she attempted??
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In a test, +3 marks are given for every correct answer and -1 are given for every incorrect answer (...
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