Question

Find the mean of x,x+2,x+4,x+6,x+8

Answer 1

$mean \: = \frac{sum \: of \: all \: observation}{total \: observation}$

$mean \: = \frac{x \: + x + 2 + x + 4 + x + 6 + x + 8}{5}$

$mean \: = \frac{5x + 20}{5}$

$mean \: = \frac{5(x + 4)}{5}$

$mean \: = x + 4$

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