Question

Find the mean of first five multiples of $3$.

Answer 1

Find the mean of first five multiples of $3$.

The first five multiples of $3$ are $3,6,9,12$ and $15$

$\mathrm{Mean}=\frac{\mathrm{Sum}\mathrm{of}\mathrm{terms}}{\mathrm{Number}\mathrm{of}\mathrm{terms}}$

$Mean=\frac{3+6+9+12+15}{5}$

$\Rightarrow Mean=\frac{45}{5}$

$\therefore Mean=9$

Hence, the mean of first five multiples of $3$ is $9$.