if the mean of the observations x, x+3 ,x+5 ,x+7, and x+10 is 9. what is the mean of last three observations.

The mean is calculated as:

The last three observations are: *x* + 5, *x* + 7, *x* + 10

The mean =

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The mean is calculated as:

The last three observations are: *x* + 5, *x* + 7, *x* + 10

The mean =

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