Mathematics, 22.07.2019 11:10 kkkhomewirk

The square sum of 10 values is 400, the mean is 5. if taking away a value 8 from the data, find the remaining mean and variance of the data.
anyone knows how to solve it?

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The square sum of 10 values is 400, the mean is 5. if taking away a value 8 from the data, find the...