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Age composition is the distribution of population into different age groups such as children, working-age and elderly.
Sex ratio is the number of females per 1000 males in a population.
An age–sex pyramid is a graph that shows the distribution of population by age groups separately for males and females.
Dependency ratio is the number of dependents (children and elderly) per 100 working-age people.
Age structure helps businesses estimate demand for age-specific products and services (any one importance).
Labour force includes people who are employed and those who are unemployed but actively seeking work.
Uses of age–sex pyramid include:
(Any three uses can be written.)
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