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If a variable x takes values x1 such tha...

If a variable x takes values `x_1` such that `a le x_1 le b` for `j = 1,2,......n` then

A

`a^2 le var (x) le b^2`

B

`a le var(x) le b`

C

`(a^2)/4 lt var(x)`

D

`(b - a)^2 gt var(x)`

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