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If births are 900, deaths are 400, in-migration is 250 and out-migration is 350, what is the actual population change?

Answer and explanation

Correct answer: 400

Direct answer: Option B, 400, is correct. Use the complete formula: actual change = births − deaths + in-migration − out-migration. Substitute the values step by step: 900 − 400 + 250 − 350. First calculate natural change: 900 − 400 = 500. Next calculate net migration: 250 − 350 = −100, because 100 more people leave than enter. Finally, combine them: 500 + (−100) = 400. Thus the population increases by 400 people. Option A, 300, does not result from the given balance. Option C, 500, is only the natural change and wrongly ignores migration. Option D, 1,400, adds all the figures, even though deaths and out-migration must be subtracted. A reliable method is to mark births and in-migration as additions and deaths and out-migration as reductions before calculating.

Related tags

Population CalculationNatural ChangeNet MigrationProcesses Of Population ChangePopulationGeographyClass 9 Mcq

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