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If a country's total population is declining while the working-age percentage is rising, which conclusion can be correct?

Answer and explanation

Correct answer: The absolute working-age population can still fall if total population declines faster than its percentage rises

An age group’s absolute number depends on two factors: its percentage share and the total population. A rising percentage does not guarantee a rising number when the total population is shrinking. In symbols, the group size is \(p\times N\), where \(p\) is the share and \(N\) is total population.

For example, if total population falls from 100 to 70 and the working-age share rises from 60% to 65%, the group changes from \(0.60\times100=60\) to \(0.65\times70=45.5\). Its percentage rises, but its actual number falls. Thus, if total decline is larger than the percentage increase, working-age numbers can decrease. Option A is correct.

Related tags

Working Age PopulationAbsolute NumberPopulation DeclineAge StructurePopulation CompositionGeographyClass 12 McqRdgdfgdfg

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