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If a region records 1200 births, 900 deaths, 500 in-migrants, and 300 out-migrants, what is the total population change?

Answer and explanation

Correct answer: 500

Total population change has two parts: natural change and net migration. Natural change is births minus deaths, while net migration is in-migrants minus out-migrants. Both parts must be included because people can be added through birth or arrival and removed through death or departure.

Here, natural increase is \(1200-900=300\). Net migration is \(500-300=200\). Adding them gives total change \(300+200=500\). The region therefore gains 500 people during the period, so option C is correct. Counting only births minus deaths would give 300 and ignore migration; counting all movements without subtracting departures would also overstate the increase.

Related tags

Total Population ChangeNatural IncreaseNet MigrationPopulation CalculationPopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And Growth

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