Ratio of boys and girls.

In a country in which people only want boys, every family continues to have children until they have a boy. if they have a girl, they have another child. if they have a boy, they stop. what is the proportion of boys to girls in the country?

Solution:

It doesn't matter how many kids a family has. The odds of having a boy or girl are always the same. So number of boys and girls in the village is same.