Percentage - General Aptitude

Q1:

In a certain school, 20% of students are below 8 years of age. The number of students above 8 years of age is  of the number of students of 8 years of age which is 48. What is the total number of students in the school?

A 72

B 80

C 120

D 150

E 100

ANS:E - 100

Let the number of students be x. Then, Number of students above 8 years of age = (100 - 20)% of x = 80% of x.

 80% of x = 48 + 2 of 48
3
80 x = 80
100
 x = 100.