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

Answer and explanation

Correct answer: Final population is 125 percent of initial population

A total increase of 25 percent means the final population is the original population plus 25 percent of it. In symbols, if the initial population is P, the final population is \(P+0.25P=1.25P\), which is 125 percent of the initial value. This conclusion follows directly from the meaning of cumulative percentage increase.

Therefore, option B is definitely correct. The information does not tell us that growth was exactly 2.5 percent every year; annual rates could vary, and compounding would also matter. It also does not identify the separate contributions of births, deaths, or migration. Thus options A, C, and D make claims that cannot be established from the stated total increase.

Related tags

Ten Year GrowthTotal Percentage IncreaseFinal PopulationPopulation CalculationPopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And Growth

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