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If births are 1000, deaths are 900, in-migration is 300 and out-migration is 400, what will be the total change?

Answer and explanation

Correct answer: 0

Direct answer: A—0. Use the population-change rule: total change = births − deaths + in-migration − out-migration. First calculate natural increase: 1000 − 900 = 100. Next calculate net migration: 300 − 400 = −100, because 100 more people leave than enter. Finally combine the two effects: 100 + (−100) = 0. Equivalently, write the complete calculation as 1000 − 900 + 300 − 400 = 0. The area therefore has no net numerical change during the stated period, even though many births, deaths and movements occurred. A is correct. B is the natural increase alone and ignores net migration. C does not follow from the given values. D is an incorrect combination of the figures and does not apply the signs correctly. Memory cue: add births and in-migration; subtract deaths and out-migration. Do not stop after calculating births minus deaths.

Related tags

Population ChangeNatural IncreaseNet MigrationNumerical ProblemProcesses Of Population ChangePopulationGeographyClass 9 Mcq

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