Question

The population of a village increases by 10% annually. If its present population is 12100, then its population 2 years ago was
1. 10000
2. 11000
3. 10100
4. 10500

Answer 1

Correct Answer - Option 1 : 10000

Given:

The population of a village increases by 10% annually and its present population is 12100.

Calculations:

Let the population 2 years ago be x.

so, x × (110/100) × (110/100) = 12100

⇒ x × (11/10) × (11/10) = 12100

⇒ x × (121/100) = 12100

⇒ x = 10000

∴ the correct answer is 10000.