Question

The average of the height of 5 students having height 30, 40, 50, 60, 70

Answer 1

$Average Height = \frac{30 + 40 + 50 + 60 + 70}{5} \\ \\ = \frac{250}{5} \\ \\ = 50$

Average height is 50

Answer 2

Answer :-

$\texttt{For finding average of}$
$\texttt{any thing we divide the}$
$\texttt{ sum of all data divided by}$ $\texttt{number of data}$

= $\frac{sum\: of\: all\: data\:}{total\: number \:of\: data}$

$\frac{= 30 + 40 + 50 + 60 + 70}{5} \\ \\ = \frac{250}{5} \\ \\ \\ = 50$

Average height = 50
Hope it helps