Question

what are the main categories of the Nations on the basis of nations income and per capital income

Answer 1

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Per capita income is national income/total population.

Per capita income is often used c measure an area's average income. This is used to see the wealth of the population with those of others. Per capita income is often used to measure a country's standard of living. It is usually expressed in terms of a commonly used international currency such as the euro orUnited States dollar, and is useful because it is widely known, is easily calculable from readily available gross domestic product(GDP) and population estimates, and produces a useful statistic for comparison of wealth between sovereign territories. This helps to ascertain a country's development status. It is one of the three measures for calculating the Human Development Index of a country