The population of a town is 189000. It decreases by 8% in the 1st year and increase by 5% in the 2nd year. What is the population of the town at the end of 2 years?

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CSIR-CLRI JSA 2024 Official Paper-I (Held On: 16 Feb, 2025)
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  1. 193914
  2. 185472
  3. 182574
  4. 191394

Answer (Detailed Solution Below)

Option 3 : 182574
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Given:

Initial population = 189000

Decrease in 1st year = 8%

Increase in 2nd year = 5%

Formula used:

Population after 2 years = Initial population × (1 - 8/100) × (1 + 5/100)

Calculation:

⇒ Population = 189000 × (92/100) × (105/100)

⇒ Population = 189000 × 0.92 × 1.05

⇒ Population = 189000 × 0.966

⇒ Population = 182574

∴ Population at the end of 2 years = 182574

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