The arithmetic mean of the following Numbers : 1, 2, 2, 3..

According to the question, Average $\begin{array}{l}=1+2+2+3+3+3+4+4+4\\ +4+5+5+5+5+5+6+6\\ +6+6+6+6+7+7+7+7\\ +7+7+7\\ \hline 28\end{array}$ Average $=\begin{array}{l}1+2\times2+3\times3+4\times4+5\\ \times5+6\times6+7\times7\\ \hline 28 \end{array}$ Average $\begin{aligned}\text{ }&=\frac{1+4+9+16+25+36+49}{28}\end{aligned}$ Average = 5