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    Question

    The average of six numbers is 54. When two more numbers are

    included, the average increases by 3. Find the average of the numbers included.
    A 60 Correct Answer Incorrect Answer
    B 63 Correct Answer Incorrect Answer
    C 66 Correct Answer Incorrect Answer
    D 69 Correct Answer Incorrect Answer

    Solution

    Sum of the 6 numbers = 54 × 6 = 324
    New average = 54 + 3 = 57
    Sum of 8 numbers = 57 × 8 = 456
    Sum of new 2 numbers = 456 - 324 = 132
    Required average = 132 ÷ 2 = 66

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