What does the dependency ratio mean?
APopulation over 65 years old to working age population.正確答案
BPopulation aged 0-14 years to total population.正確答案
CPopulation aged 0-14 years and over 65 to the total population.正確答案
DPopulation aged 0-14 and over 65 working age population.正確答案
答案與詳解
