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18 December, 23:05

102, 126, 118, 120, x; mean = 120?

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  1. 19 December, 00:31
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    Mean is just the arithmetic average ... sum of elements divided by the number of elements ...

    (102+126+118+120+x) / 5=120

    (466+x) / 5=120

    466+x=600

    x=134
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