Question

If the arithmetic mean of $7,5,13,x$ and $9$ is $10$, then find the value of $x$.

Answer 1

Given arithmetic mean of $7,5,13,x$ and $9$ is $10$

we know $mean=\frac{sumofobservations}{noofobservations}$

Here no of observations $=5$

$10=\frac{7+5+13+x+9}{5}$

$34+x=50\Rightarrow x=50-34$

$x=16$

value of $x=16$