Question

Find the arithmetic mean of 4 and 6.

Answer 1

Given that, $a=4,b=6$
$\therefore n=2$

We know that,

$\text{mean}=\frac{\sum _{i=1}^n{a}_i}{n}$

$\Rightarrow \frac{a+b}{2}=\frac{4+6}{2}=5$.

Hence, the arithmetic mean of $4$ and $6$ is $5$.