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    The average of 6 numbers is 18. If each number is increased by 5, what will be the new average?
    Question

    The average of 6 numbers is 18. If each number is increased by 5, what will be the new average?

    A.

    20

    B.

    25

    C.

    23

    D.

    18

    Correct option is C

    Given:

    The average of 6 numbers is 18. Each number is increased by 5..

    Solution:
    Let the sum of the 6 numbers be S.
    The average of these 6 numbers is given as 18, so:
    S / 6 = 18
    Therefore, S = 18 ×\times​ 6 = 108.
    Now, each number is increased by 5. The new sum of the numbers will be:
    New Sum = S + (5 ×\times​ 6) = 108 + 30 = 138.
    The new average is the new sum divided by the number of numbers:
    New Average = 138 / 6 = 23.

    The new average is 23.

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