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19 June, 12:46

In a test + 3 marks are given for every correct answer and - 1 mark for every incorrect answer. Sona attempted all the questions and scored + 20 marks through she got 10 correct answers. How many questions were asked?

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  1. 19 June, 13:19
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    Answer: 20

    Step-by-step explanation:

    (i) Sona got 10 answers correct.

    1 correct answer = 3 marks

    10 correct answers = 10*3 = 30 marks but she got only 20

    1 wrong answer = - 1 mark

    that means she attempted 10 incorrect answers.

    No. of questions in the test = no. of incorrect + no. of correct answers

    10+10 = 20
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