If the total population of economy W is 600, and the number of employed people is 200, the worker-population ratio is .
If the population growth from 1998 to 2000 was 10 %, what is the ratio of total population in 1998 to the number of people who voted for the party in 2000(approx)?
Graphical representation of the total population of a country, males and female population ratio and old and young people ratio is classified as __________.