Question

what is per capita income

Answer 1

Total national income (GDP) divided by total population. It is not the average income (because it includes children and non-working population) but serves as an indicator of a country's living standards.

Answer 2

Per capita income is the amount of money which a single person can have to spend.
It is given by national income divided by the total population of that country.
Higher per capita income means higher development.