Question Number 94616 by aqsa akram last updated on 20/May/20
$${S}=\sqrt{\frac{{f}\overset{\hat { }\mathrm{2}} {{x}}}{{n}}−\left(\frac{{fx}}{{n}}\overset{\hat { }\mathrm{2}} {\right)}} \\ $$
Answered by aqsa akram last updated on 20/May/20
S-fx-2-n-fx-n-2-