Question

The mean of eight numbers is $\text{16}$. Six of the numbers are $\text{17,10,12,9,6 and 12.}$The remaining two numbers are each equal to$\text{x}$.

Find the value of $\text{x.}$

Answer 1

Mean $\text{= 16}$

Mean $\text{=}\frac{\text{Sum of observation}}{\text{Number of Observation}}$

$\text{16 =}\frac{\text{17+10+12+9+6+12+x+x}}{\text{8}}$

$\text{66 + 2x = 128}$

$\text{x= 31}$

Hence, the value of $\text{x is 31}$