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    Question

    A student got an average score of certain marks in the

    first 16 tests. In the next 4 tests, she scored 76 marks on average. This raised her overall average by 2 marks. What was her average score in the first 16 tests?
    A 64 Correct Answer Incorrect Answer
    B 66 Correct Answer Incorrect Answer
    C 68 Correct Answer Incorrect Answer
    D 70 Correct Answer Incorrect Answer

    Solution

    Let, average marks in first 16 tests is x So, (16 ├Ч x + 4 ├Ч 76)/20 = x + 2 Or, 16x + 304 = 20x + 40 Or, 4x = 264 Or, x = 66

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