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If an area has 4,000 births, 2,500 deaths, and net migration of -1,800, what will be the total population change?

Answer and explanation

Correct answer: A decrease of 300

Correct answer: A, a decrease of 300. First calculate natural increase: births minus deaths = 4,000 - 2,500 = 1,500. Then include net migration with its sign: total change = natural increase + net migration = 1,500 + (-1,800) = -300. A negative result means the population decreases by 300, not that it increases by 300. Option A is correct. Option B has the correct number but reverses the meaning of the negative sign. Option C gives only the natural increase and ignores migration. Option D incorrectly adds births and deaths instead of subtracting deaths and also ignores the negative migration. Memory cue: total population change = (births - deaths) + net migration; always preserve the plus or minus sign of migration.

Related tags

Population GrowthNet MigrationNatural IncreasePopulationGeographyClass 9 Mcq

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