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If natural increase is +13 per thousand and total growth is +4 per thousand, what is the net migration rate?

Answer and explanation

Correct answer: -9 per thousand

Total growth is the sum of natural increase and net migration. Therefore, net migration can be isolated by subtracting natural increase from total growth. Both rates use the same unit, per thousand, so no unit conversion is needed before subtraction.

Net migration = total growth − natural increase = \(+4-+13=-9\) per thousand. The negative sign means that more people left than entered, reducing the total growth below the natural increase. Thus option B is correct. A positive 9 per thousand would reverse the subtraction and would make total growth 22 per thousand rather than the stated 4 per thousand.

Related tags

Net MigrationNatural IncreaseTotal GrowthOut MigrationPopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And Growth

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