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A region records 900000 births, 600000 deaths, 200000 immigrants and 100000 emigrants in one year. What is the total population change?

Answer and explanation

Correct answer: Increase of 400000

Total population change has two parts: natural increase and net migration. Natural increase is births minus deaths. Net migration is immigrants minus emigrants. Both parts must be included; counting births alone or ignoring migration would give an incorrect result.

Natural increase = \(900000 - 600000 = 300000\). Net migration = \(200000 - 100000 = 100000\). Therefore, total change = \(300000 + 100000 = 400000\). The population increases by 400,000, or 4 lakh, so option C is correct. The 3-lakh answer includes only natural increase and misses the additional 1 lakh gained through migration.

Related tags

Total Population ChangeNatural IncreaseNet MigrationPopulation ArithmeticPopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And Growth

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