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If a country's youth dependency ratio falls from 50 to 28 while old-age dependency rises from 12 to 24, what happens to the total dependency ratio?

Answer and explanation

Correct answer: It will fall by 10 points

The total dependency ratio is obtained by adding the youth dependency ratio and the old-age dependency ratio. Initially, it is \(50+12=62\). After the changes, it becomes \(28+24=52\). The difference is \(52-62=-10\), so the total ratio falls by 10 points. The increase in old-age dependency is 12 points, but the fall in youth dependency is larger at 22 points, producing a net decrease of 10.

Option B is correct. Option A would consider only the rise in old-age dependency and ignore the larger decline among youth. Option C uses the youth change alone, while D wrongly assumes the two changes cancel. The calculation concerns percentage points of the ratio, not a 10 percent relative decrease. Therefore total dependency decreases from 62 to 52.

Related tags

Dependency TransitionYouth DependencyOld Age DependencyTotal DependencyAge StructurePopulation CompositionGeographyClass 12 Mcq

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