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14 January, 23:49

The mean of the data set is 18. What number is missing from the series of 21 11 27 22 13 16

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  1. J
    15 January, 01:34
    0
    16

    Step-by-step explanation:

    Mean: Sum of numbers / Number of numbers

    You will have 7 numbers, including the missing number.

    Rearrange the formula to find the sum of the numbers

    Sum of the numbers = Mean * Number of Numbers

    Mean = 18 * 7

    Mean = 136

    Now minus all the numbers you have to find the missing number.

    126 - 21 - 11 - 27 - 22 - 13 - 16 = 16

    Your missing number is 16.

    You can check if it's correct by finding the sum of the numbers and dividing it by 7.

    Mean: Sum of numbers / Number of numbers

    18 = 126 / 7
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