In an examination, 30% and 35% students respectively failed in History and Geography while 27% students failed in both subjects. If the number of students passing the examination is 248, find the total number of students who appeared in the examination.

Answer: Option B

Percentage of failed candidates = (30 + 35 - 27)% = 38%
Percentage of passed candidates = (100 - 38)% = 62%
Let the total number of students appeared be x
Then, 62% of x = 248
⇒ x = $$\frac{248\times 100}{62}$$
⇒ x = 400