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    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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