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If births are 1,000, deaths are 700, in-migration is 100, and out-migration is 500, what is the total population change?

Answer and explanation

Correct answer: Negative 100

Direct answer: A, negative 100. Total population change is calculated as natural increase plus net migration. Natural increase = births − deaths = 1,000 − 700 = 300. Net migration = in-migration − out-migration = 100 − 500 = −400. Now combine the two components: total change = 300 + (−400) = −100. The negative sign means the population decreases by 100 during the stated period. A is correct. B is wrong because the positive natural increase of 300 does not fully balance the net loss of 400 through migration. C is wrong because it ignores the larger number of people leaving. D is wrong because it treats the components as though all movements added to the population. The useful formula is: total change = births − deaths + in-migration − out-migration. Memory cue: births and in-migration add people; deaths and out-migration subtract people.

Related tags

Total Population ChangeNatural IncreaseNet MigrationNumerical ProblemProcesses Of Population ChangePopulationGeographyClass 9 Mcq

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