1.

The mean of the observations x – 1, x and x + 1 isA) 3x B) x C) 2x D) 0

Answer»

Correct option is (B) x

Mean \(=\frac{(x-1)+x+(x+1)}3\)

\(=\frac{3x}3=x\)

Correct option is  B) x



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