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    Question

    The average of 27 numbers is 25.The average of first 13

    numbers is 16 and that of the last 13 numbers is 19. What will be the 27th number?
    A 178 Correct Answer Incorrect Answer
    B 111 Correct Answer Incorrect Answer
    C 207 Correct Answer Incorrect Answer
    D 220 Correct Answer Incorrect Answer

    Solution

    Sum of 27 numbers = 27 × 25 = 675 Sum of first 13 numbers = 13 × 16 = 208 Sum of last 13 numbers = 13 × 19 = 247 Therefore, 27th number = 675 – (208 + 247) = 220

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