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Let barx(1)andbarx(2) (where barx(2)gtba...

Let `barx_(1)andbarx_(2)` (where `barx_(2)gtbarx_(1)`) be the means of two sets comprising `n_(1)andn_(2)` (where `n_(2)ltn_(1)`) observations respectively. If `barx` is the mean when they are pooled, then which one of the following is correct ?

A

`barx_(1)ltbarxltbarx_(2)`

B

`barxgtbarx_(2)`

C

`barxltbarx_(1)`

D

`(barx_(1)-barx)+(barx_(2)-barx)=0`

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