Question

Find the mean of first five multiples of 8.

Answer 1

$$\begin{gathered} \mathrm{The}\mathrm{first}5\mathrm{multiples}\mathrm{of}8\mathrm{are}: \\ 8,16,24,32\mathrm{and}40 \\ \mathrm{Mean}\mathrm{of}\mathrm{first}5\mathrm{multiples}\mathrm{of}8=\frac{\mathrm{sum}\mathrm{of}\mathrm{first}5\mathrm{multiples}\mathrm{of}8}{5} \\ \Rightarrow \mathrm{mean}=\frac{8+16+24+32+40}{5}=\frac{120}{5}=24 \end{gathered}$$