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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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