The average number of students qualified in the examination from Schools C and D is what percent of the average number of students appeared for the examination from the same school? ( round off to 2 digits after decimal).

A. 58.62%

B. 73.91%

C. 62.58%

D. 58.96%

E. None of these

Answer: Option B

Solution(By Examveda Team)

Average number of students qualified from C and D
$$\eqalign{ & = \frac{1}{2}\left(2250+2000\right) \cr & = \frac{4250}{2} \cr & = 2125 \cr} $$
Average number of students appeared from C and D
$$\eqalign{ & = \frac{1}{2}\left(3250+2500\right) \cr & = \frac{5750}{2} \cr & = 2875 \cr & \therefore \text{ Required %} \cr & = \left(\frac{2125}{2875}\times100\right)\% \cr & = \left(\frac{85}{115}\times100\right)\% \cr & = \frac{1700}{23}\% \cr & = 73.91\% \cr} $$