Question

age structure shot note

Answer 1

its the index to classify the age ranges for population or HDI purpose

suppose total population of Country is 20

1 - 10 (aged group )  = 6
10 -25 (aged group) = 6
25-40(aged group) = 5
40+ = 3 like they will classify population of countrys if there are more childs then country has bright future india has his child age structure