Question

    Ballu gets 5 marks for each correct answer and loses 3

    marks for each wrong answer. If he attempts 40 sums and obtains 80 marks. The number of sum solved correctly is
    A 25 Correct Answer Incorrect Answer
    B 20 Correct Answer Incorrect Answer
    C 15 Correct Answer Incorrect Answer
    D 50 Correct Answer Incorrect Answer

    Solution

    Let the ballu correct sums be x According to the question Correct marks – incorrect marks = Total marks 5 x – 3(40 - x) = 80 5x – 120+ 3x = 80 8x = 200 x = 25

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