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A country's population increases by 25 percent over ten years. Which conclusion is definitely correct?

Answer and explanation

Correct answer: Final population is 125 percent of initial population

A 25 percent increase means the increase is one-quarter of the initial population. Consequently, the final population equals the initial population plus 25 percent of it, or 125 percent of the initial population. Thus choice B is definitely correct.

The statement does not tell us that growth was exactly 2.5 percent in every year. Annual rates may vary and still produce a total ten-year increase of 25 percent. It also does not reveal the birth rate or prove that migration was zero, because total population change can result from births, deaths, immigration, and emigration together. Only the relationship between the initial and final population is certain: final population = 1.25 times initial population.

Related tags

Total Percentage GrowthFinal PopulationCompound GrowthPopulation InterpretationPopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And Growth

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