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Let alpha, beta in R. If the mean and th...

Let `alpha, beta in R`. If the mean and the variable of 6 observation, `-3, 4, 7, -6, alpha, beta` be 2 and 23 respectively then mean deviation about the mean of the 6 observation is

A

`(14)/3`

B

`(16)/3`

C

`(11)/3`

D

`(13)/3`

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The correct Answer is:
D
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