Following data shows the information about marks obtained in Physics, Chemistry, Mathematics and Biology by…
Following data shows the information about marks obtained in Physics, Chemistry, Mathematics and Biology by 100 students in a class. Then subject shows the highest variability in marks
Mathematics
Chemistry
Biology
Physics
Solution
$\begin{aligned} & \text { We know that Coefficient of Variation }=\frac{\text { Standard Deviation }}{\text { mean }} \\ & \therefore \quad(\text { C.V. })_{\text {Physics }}=\frac{3}{20}=0.15 \text { and }(\text { C.V. })_{\text {Chemistry }}=\frac{2}{25}=0.08 \\ & \left.\text { (C.V. })_{\text {Mathematics }}=\frac{4}{23}=0.174 \text { and (C.V. }\right)_{\text {Biology }}=\frac{5}{27}=0.185\end{aligned}$
