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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

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In a test, +3 marks are given for every correct answer and –1 markare given for every incorrect answer. Sona attempted all the questionsand 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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1 Answer

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(i) 10

(ii) 30
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