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    Question

    A student's average score across five subjects is 80. If

    the scores in four subjects are 78, 85, 82, and 88, what is the average of the top three highest-scoring subjects?
    A 80 Correct Answer Incorrect Answer
    B 85 Correct Answer Incorrect Answer
    C 82 Correct Answer Incorrect Answer
    D 83 Correct Answer Incorrect Answer

    Solution

    Total marks of 5 subjects = 80×5 = 400 Marks of 5th subject = 400 - (78 + 85 + 82 + 88) = 400 - 333 = 67 Top 3 scores = 88, 85, 82 Required average = 1/3 (88 + 85 + 82) = 255/3 = 85

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