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If a country's total growth rate is 1.5 percent and its natural increase rate is 0.9 percent, what is the net migration rate?

Answer and explanation

Correct answer: 0.6 percent

Total population growth is the combined result of natural increase and net migration. Therefore, the relationship is total growth rate = natural increase rate + net migration rate. To find the migration rate, rearrange this relationship by subtracting the natural increase from the total growth. Both rates are percentages, so they can be subtracted directly.

Net migration rate = 1.5 − 0.9 = 0.6 percent. Therefore, option B is correct. The positive sign means that immigration exceeded emigration by an amount equal to 0.6 percent of the relevant population. If migration had been zero, total growth would have remained 0.9 percent. The value 0.4 percent would leave the total at 1.3 percent, not the stated 1.5 percent.

Related tags

Net Migration RateTotal GrowthNatural IncreasePopulation EquationPopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And Growth

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