## 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**