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If births are 3,600, deaths are 2,100 and net migration is −800, what will the total population growth be?

Answer and explanation

Correct answer: 700

Direct answer: B, 700, is correct. First calculate natural increase by subtracting deaths from births: 3,600 − 2,100 = 1,500. Next include net migration. Since migration is −800, it reduces the increase: 1,500 + (−800) = 700. Therefore the population grows by 700 people, not by 1,500. A is only the natural increase and ignores migration. C would result from adding 800 instead of subtracting it, so it uses the wrong sign. D incorrectly adds births, deaths and migration without considering that deaths and outward migration reduce population. The safest method is to write the formula first: total change = births − deaths + net migration. Memory cue: a negative migration value must be added algebraically, which means it is subtracted in the final calculation.

Related tags

Population Growth CalculationBirths And DeathsNegative MigrationPopulation GrowthPopulationGeographyClass 9 Mcq

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