A school has 2100 students. For every 20 students there is one class monitor. The number of monitors in the school is

Question

A school has 2100 students. For every 20 students there is one class monitor. The number of monitors in the school is

A. 75

B. 80

C. 85

D. 100

Answer: D

Solution:

Generally we may commit mistake of dividing 2100/20.

But out of 21 students there is one monitor.

So, it will be 2100/21 = 100