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If a country has a population of 100 million with a natural increase rate of 1 percent and net migration rate of 0.5 percent, what is the approximate total increase in one year?

Answer and explanation

Correct answer: 1500000

Total population growth can include two components: natural increase and net migration. When both rates are stated for the same year and population, they are added algebraically. The natural increase is 1 percent and the net migration rate is 0.5 percent, so the approximate total growth rate is 1.5 percent. This assumes the rates use the same population base.

One percent of 100 million is 1 million, and 0.5 percent is 500,000. Adding them gives 1.5 million people. Equivalently, 100,000,000 × 0.015 = 1,500,000. Thus, option C, 1.5 million or 15 lakh, is correct. The answer 10 lakh counts only natural increase and ignores migration, while 20 lakh would represent a 2 percent increase rather than the stated 1.5 percent.

Related tags

Total Growth CalculationNatural IncreaseNet MigrationPopulation ArithmeticPopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And Growth

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