To calculate a country's dependency ratio, one needs to know the country's population and?. Geography

the number older than age 64
the number of children still receiving financial support from their parents
the number of people who are actively looking for work but are unable to find it
the number younger than age 15
all of a country's population younger than age 15 or older than age 64

Materials by theme:

Social change and social development. Concepts of social progress Lections

Environmental issues Lections

Population study and its significance Lections

Economic Systems Lections

A Global World Lections