Question

find the mean of x-x, x and x+x?
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Answer 1

Answer:

Mean of 0, x, and 2x=>

(0+x+2x)/3

=> 3x/3

=> x

Answer 2

Answer:

$Mean=\dfrac{Sum \: of \: observations}{Number \: of \: observations}$

$Mean=\dfrac{(x-x)+(x)+(x+x)}{3}$

$Mean=\dfrac{0+x+2x}{3}$

$Mean=\dfrac{\cancel{3}x}{\cancel{3}}$

$Mean=x$