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If 40 people enter and 70 people leave, what will the net migration be?

Answer and explanation

Correct answer: Negative 30

Direct answer: B, negative 30. Use the formula net migration = people entering − people leaving. Thus, net migration = 40 − 70 = −30. The negative sign shows that 30 more people left the area than entered it, so the area experienced a net loss through migration. A, positive 30, reverses the subtraction and would apply if 70 entered and 40 left. B is correct because the result is −30. C, zero, would require equal numbers entering and leaving, such as 40 and 40. D, positive 110, comes from adding 40 and 70 and also gives the wrong sign; addition does not measure net migration. Common confusion: a negative result does not mean that a person is negative; it indicates a decrease in population caused by migration.

Related tags

Negative Net MigrationMigration BalanceOut-MigrationPopulation ChangeProcesses Of Population ChangePopulationGeographyClass 9 Mcq

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