The mean of 8 numbers is 21. What is the sum?

Question

The mean of 8 numbers is 21. What is the sum?

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Thu Thảo 4 years 2021-08-01T05:13:02+00:00 2 Answers 3 views 0

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    2021-08-01T05:14:36+00:00

    Answer:

    168

    Step-by-step explanation:

    8 numbers.

    Mean = add all up then divide by 8 so the opposite is 21*8 or 168

    that is the sum.

    Hope this helpzplz hit the crown 😀

    0
    2021-08-01T05:14:48+00:00

    Average of 8 numbers is 21.

    If each number is multiplied by 8 then the average will also get eight times.

    Therefore average is 21×8=168.

    Explination:

    Let eight numbers be x1 ,x2 ,x3, …….. x8.

    To take average we add all numbers an divide by the total numbers we have

    So avg is

    (x1 + x2+x3+………..x8)÷8=21

    Now all numbers are multiplied by eight

    So eight we will be taking as common

    Therefore average is

    8 (x1+ x2+ x3………..x8)÷8

    Now we know (x1+ x2+ x3………x8)÷8= 21

    So it becomes

    8×21

    Which is equal to 168.
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