Question

If the mean of 8, 11, x, 10, 7 is 9 the x = _______​

Answer 1

Answer:

10

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Answer 2

Answer:

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Step-by-step explanation:

Mean = sum observations / number of observations

9 = 8 + 11 + x + 10 + 7 / 5

9 = 36 + x / 5

9 × 5 = 36 + x

45 = 36 + x

x = 45 - 36

x = 9