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If a population pyramid has a large bulge in ages 40 to 54, in which age group will the same cohort most strongly appear fifteen years later?

Answer and explanation

Correct answer: 55 to 69 years

A population pyramid follows cohorts, meaning groups of people born around the same period. As time passes, a cohort becomes older and moves into the next age categories. The people who are currently 40 to 54 years old will be 15 years older after fifteen years.

Adding 15 years to both ends gives ages 55 to 69. Therefore, the present bulge in the 40–54 group will appear mainly in the 55–69 group later, apart from effects of mortality and migration. Option C is correct. The 40–54 group would describe the same people only if no time had passed, while the younger options move the cohort in the wrong direction.

Related tags

Cohort ProgressionPopulation PyramidAgeing CohortFuture Age StructureAge StructurePopulation CompositionGeographyClass 12 Mcq

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