The population of a town at the start of a year was 850000 . In the first year, there was a growth in the population at a rate of 12 per thousand, and in the next year, there was a decrease in the population at a rate of 1%. The population at the end of two years is:

Explanation

Given: Present population = 850000 First year increment = 12 per 1000 Second year decreament = 1% Formula used: Final year population = Present population × (100 ± R)/100 Here, R = increment or decrement Calculation: 12 for 1000 = 1.2% Final year population = 850000 × (100 + 1.2)/100 × (100 - 1)/100 ⇒ 850000 × (101.2/100) × (99/100) ⇒ 851598 ∴ The population at the end of two years is 851598.