What do you mean by is composition? Classify the population on the basis of population

The age composition of a population refers to the number of people in different age groups in a country. The population of a nation is generally grouped into three broad categories .

( a ) Children  ( generally below 15 years ) They are economically unproductive and need to be provided with food , clothing , education and medical care. 

( b ) Working Age ( 15 - 59 years ) They are economically productive and biological by reproductive . They comprise the working population . 

( c ) Aged ( above 59 years ) They can be economically productive though they may have retired . They may be working voluntarily but they are not available for employment through recruitment . 

The percentage of children and the aged affect the dependency ratio because these groups are not productive.