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If a country's total dependency ratio is 75 and the old-age dependency ratio is 20, what is the youth dependency ratio?

Answer and explanation

Correct answer: 55

The total dependency ratio combines two parts: youth dependency and old-age dependency. Both are usually measured as the number of dependents per 100 people of working age. Therefore the relationship is \(\text{total dependency} = \text{youth dependency} + \text{old-age dependency}\). Substituting the given values gives \(\text{youth dependency} = 75 - 20 = 55\).

Option B is correct. The calculation assumes that all three ratios use the same denominator, namely the working-age population, which is the standard definition. It would be incorrect to add 75 and 20, because the old-age ratio is already included within the total. It would also be wrong to compare the ratios using different age bases. Thus the youth component is 55 dependents per 100 working-age people.

Related tags

Youth DependencyTotal DependencyOld-Age DependencyDemographic CalculationAge StructurePopulation CompositionGeographyClass 12 Mcq

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