Question Number 95912 by i jagooll last updated on 28/May/20
$$\begin{pmatrix}{\mathrm{2n}}\\{\mathrm{n}}\end{pmatrix}\:=\:\mathrm{20}\: \\ $$$$\mathrm{find}\:\mathrm{n}? \\ $$
Commented by MJS last updated on 28/May/20
$${n}=\mathrm{3} \\ $$
Commented by i jagooll last updated on 29/May/20
$$\mathrm{by}\:\mathrm{observasi}\:\mathrm{sir}? \\ $$