Question

For a certain frequency distribution, if median $=156$ and mode $=180$, then obtain the value of mean

Answer 1

By empirical formula
mode $=3\times$ median $-2\times$ mean
$\Rightarrow 180=3\times 156-2\times$ mean
$\Rightarrow 2\times$mean $=468-180$
$\Rightarrow$ mean $=144$