Find the value of y if the mean is 22 and 18 ( 2y+1), 10 and 20 is 15 ​

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Find the value of y if the mean is 22 and 18 ( 2y+1), 10 and 20 is 15

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Tài Đức 1 week 2021-07-22T20:34:55+00:00 1 Answers 1 views 0

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    2021-07-22T20:36:24+00:00

    Answer:

    2

    Step-by-step explanation:

    Mean = sum of data/sample size

    Sum of data = 22 + 18 + 2y+1 + 10 + 20

    Sample size = 5

    Mean = 15

    Substitute

    15 = 22 + 18 + 2y+1 + 10 + 20/5

    15*5 = 22 + 18 + 2y+1 + 10 + 20

    75 = 70+2y+1

    2y = 75-71

    2y = 4

    y = 4/2

    y = 2

    Hence the value of y is 2

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )