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If an area has 5500 births, 3800 deaths, 1200 in-migrants and 2500 out-migrants, what is the total change?

Answer and explanation

Correct answer: Increase of 400

Direct answer: A, an increase of 400. Population change has two parts: natural change and migration change. First calculate natural increase: births minus deaths = 5500 − 3800 = 1700. Next calculate net migration: in-migrants minus out-migrants = 1200 − 2500 = −1300, meaning 1300 more people left than entered. Add the two parts: 1700 + (−1300) = 400. Therefore the area gained 400 people overall. B gives only the natural increase and ignores migration. C incorrectly combines figures without using the proper signs. D treats the final positive result as a loss. Memory cue: births minus deaths, then arrivals minus departures; finally add both results.

Related tags

Population GrowthNet MigrationNatural IncreaseCalculationPopulationGeographyClass 9 Mcq

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