What is the difference between the average number of students appeared in the scholarship exam from all the given schools and the average number of students qualified from all the school together?

Answer: Option A

Average number of students appeared from all the schools
= $$\frac{1}{5}$$(3000 + 2250 + 3250 + 2500 + 3000)
= $$\frac{14000}{5}$$
= 2800
Average number of students qualified from all the schools
= $$\frac{1}{5}$$(1750 + 1250 + 2250 + 2000 + 2000)
= $$\frac{9250}{5}$$
= 1850
∴ Required difference
= 2800 - 1850
= 950