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A country has a population of 80 million and natural increase of 1.2 million. If total population change is only 400000, what was net migration?

Answer and explanation

Correct answer: Negative 800000

Total population change is made up of natural increase plus net migration. Natural increase reflects births minus deaths, while net migration reflects people entering minus people leaving. Therefore, if total change and natural increase are known, net migration is found by subtracting natural increase from total change.

Using the values, \(400000=1200000+\text{net migration}\). Hence, net migration is \(400000-1200000=-800000\). The negative sign means that 800000 more people left than entered. In Indian notation, this is a net out-migration of 8 lakh. Therefore, option B is correct. Population size itself is not needed for this calculation.

Related tags

Net MigrationReverse CalculationNatural IncreaseTotal Population ChangePopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And Growth

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