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The arithmetic mean of the numbers 4, 9, 3, 2, x, 5 and 1 is 4. Find x.

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  1. 6 May, 12:10
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    x = 1

    Step-by-step explanation:

    (4 + 9 + 3 + 2 + x + 5) / 6 = 4

    (4 + 9 + 3 + 2 + x + 5) = 6*4

    (4 + 9 + 3 + 2 + x + 5) = 24

    x = 24 - (4 + 9 + 3 + 2 + 5)

    x = 24 - 23

    x = 1
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