In an exam, marks of 8 students are as follows:

25, 21, 20, 28, 26, 30, 15, 24

What will be the mean?

Concept: Central tendency is a measure with (Mean, Mode and Median)

The average of the given number of observations is called the mean.

Mean of given observations is:

$\Rightarrow Mean=\frac{Sumofobservations}{Numberofobservation}$

Therefore,

$\begin{array}{l}\Rightarrow Mean=\frac{25+21+20+28+26+30+15+24}{8}\\ \Rightarrow \frac{189}{8}=23.6\\ \therefore Mean=23.6\end{array}$