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  • 19. In an Examination, (+2) marks are given for every correct answer, and (-0.5) marks are given for every wrong answer, and 0 for non-attempting any question. (a) Latika scores 30 marks. If she got 20 correct answers, how many questions she attempted in

19. In an Examination, (+2) marks are given for every correct answer, and (-0.5) marks are given for every wrong answer, and 0 for non-attempting any question. (a) Latika scores 30 marks. If she got 20 correct answers, how many questions she attempted incorrectly? (b) Sara scores -4 marks if she got 3 correct answers, how many were incorrect??

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\(a)\ \ extLatika got 20 correct answers.\\ extSo total marks got by those correct answers = 20 imes 2 = 40 \\ extAs she got 30 marks only. It means she lost 10 marks by wrong answers.\ extFor losing 10 marks, she has to attempted 20 question incorrectly. \\ (b)\\ extFor 3 correct answers, marks got by Sara = 3 imes 2 = 6 \\ extShe scores -4. it means she lost 10 marks by wrong answers.\\ extFor losing 10 marks, she has to attempted 20 question incorrectly.

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Deependra Verma

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