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If total dependency is 60, child dependency is 20, and the working-age population is 62.5 percent, what is the elderly share?

Answer and explanation

Correct answer: 25 percent

Total dependency is the sum of child dependency and elderly dependency because both are measured against the same working-age base. First remove the child component from the total to find the elderly dependency. Then convert that ratio into the elderly share of the total population using the given working-age share.

Elderly dependency = \(60-20=40\). If the elderly share is \(E\), then \(\frac{E}{62.5}\times100=40\). Hence \(E=62.5\times0.40=25\) percent. Therefore, option C is correct. The remaining population check also works: child plus working-age plus elderly shares are not required to be recalculated, but the elderly value correctly produces a ratio of 40 against a 62.5 percent working-age base.

Related tags

Elderly ShareTotal DependencyChild DependencyMulti Step CalculationAge StructurePopulation CompositionGeographyClass 12 Mcq

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