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    5. The average of 25 numbers is 22.The average of first 12 numbers is 14 and that of the last 12 number

    Question

    The average of 25 numbers is 22.The average of first 12

    numbers is 14 and that of the last 12 numbers is 17. What will be the 25th number?
    A 178 Correct Answer Incorrect Answer
    B 226 Correct Answer Incorrect Answer
    C 190 Correct Answer Incorrect Answer
    D 184 Correct Answer Incorrect Answer

    Solution

    Sum of 25 numbers = 25 × 22 = 550 Sum of first 12 numbers = 12 × 14 = 168 Sum of last 12 numbers = 12 × 17 = 204 Therefore, 25th number = 550 – (168 + 204) = 178

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