Question

What is national income? How it is calculated? Also tell me how BMI is calculated?

Answer 1

national icome means goods and services produced in country with in a year .

it is calulated by per capita income or average income.
a persom height in cm upon his weight.. bmi is calculated in this form

Answer 2

national income is the total value of goods and services produced in a country during one year

national income is calculated as national income divides by the population in a year