Question

If the mean of numbers $28,x,42,78$ and $104$ is $62,$ then the mean of $48,62,98,124$ and $x$ is

Answer 1

As given that mean of numbers $28,x,42,78$ and $104$ is $62$
$\frac{28+42+78+104+x}{5}=62$
$\Rightarrow 28+42+78+104+x=62\times 5\dots \left(1\right)$
$\Rightarrow x=58$
Now mean of $48,62,98,124$ and $58$
$=\frac{48+62+98+124+58}{5}$
$=78$