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8 June, 21:36

If the average (arithmetic mean) of 10,20,30,40, and x is 60, what is the value of x

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  1. 8 June, 21:56
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    60 = (10 + 20 + 30 + 40 + x) / 5

    300 = 100 + x

    x = 200

    Answer: 200
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