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, 27thnumber = 675 – (208 + 247) = 220

    Practice Next