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If there are 4500 births, 2900 deaths, 800 in-migrants and 1400 out-migrants, what will the total change be?

Answer and explanation

Correct answer: Increase of 1000

The correct answer is A: an increase of 1000. Solve the two components separately. First, natural increase equals births minus deaths: 4500 − 2900 = 1600. Second, net migration equals in-migration minus out-migration: 800 − 1400 = −600, meaning a migration loss of 600. Now combine them: total change = natural increase + net migration = 1600 + (−600) = 1000. Therefore the population grows by 1000. B gives only the natural increase and ignores migration. C incorrectly adds the migration numbers instead of taking their difference. D adds all figures without considering that deaths and out-migration reduce population. Memory cue: use births − deaths, then add in-migration − out-migration.

Related tags

Population CalculationBirthsDeathsMigrationProcesses Of Population ChangePopulationGeographyClass 9 Mcq

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