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If an area has 3,100 births, 3,100 deaths, 900 immigrants and 1,200 emigrants, what will the total population change be?

Answer and explanation

Correct answer: A decrease of 300

Answer: A, a decrease of 300. Solve the two components separately. First calculate natural increase: births minus deaths = 3,100 − 3,100 = 0. Next calculate net migration: immigrants minus emigrants = 900 − 1,200 = −300. Finally combine them: total population change = natural increase + net migration = 0 + (−300) = −300. A negative result means the population decreases by 300. Option B reverses the sign of net migration. Option C notices that natural increase is zero but forgets migration. Option D incorrectly adds births and deaths and also ignores the direction of migration. Memory cue: use the formula births − deaths + immigrants − emigrants; keep the signs clear.

Related tags

Population ChangeNet MigrationDemographic CalculationNatural IncreaseProcesses Of Population ChangePopulationGeographyClass 9 Mcq

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