The mean of 5 observations is 5 and thei...

The mean of 5 observations is 5 and their variance is 124. If three of the observationsare `1,2 and 6,` then the mean deviation from the mean of the data is (1) `2.4` (b) `2.8` (c) `2.5` (d) `2.6`

A

`2.5`

B

`2.6`

C

`2.8`

D

`(1.6 )+ ( 1+3sqrt2) ` (modified)

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The correct Answer is:

D

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