If the mean of 5 numbers is 10 and the mean of other 15 numbers is 20 , what is the combined mean of both 20 numbers​

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If the mean of 5 numbers is 10 and the mean of other 15 numbers is 20 , what is the combined mean of both 20 numbers​

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Ngọc Khuê 5 years 2021-08-17T02:55:13+00:00 1 Answers 38 views 0

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  1. ThanhThu
    0
    2021-08-17T02:57:02+00:00
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    9514 1404 393

    Answer:

      17.5

    Step-by-step explanation:

    The sum of the 5 numbers is 5·10 = 50.

    The sum of the 15 numbers is 15·20 = 300.

    The sum of all 20 numbers is then 50+300 = 350, so their mean is …

      mean = sum/number = 350/20 = 17.5

    The combined mean of the 20 numbers is 17.5.

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