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    Question

    A student's average score across five subjects is 72. If

    the scores in four subjects are 68, 75, 70, and 80, what is the average of the top three highest-scoring subjects?
    A 73 Correct Answer Incorrect Answer
    B 74 Correct Answer Incorrect Answer
    C 75 Correct Answer Incorrect Answer
    D 76 Correct Answer Incorrect Answer
    E 77 Correct Answer Incorrect Answer

    Solution

    Total marks of 5 subjects = 72×5 = 360 Marks of 5th subject = 360 – (68+75+70+80) = 360-293 = 67 Top 3 scores = 80, 75, 70 Required average = 1/3 (80+75+70) = 225/3 = 75

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