" Income is measured on the basis of : "

A survey of monthly incomes of 100 families living in a village was conducted. Calculate the mean monthly income of the families on the basis of the following information about them.

Define the term ' osmotic pressure' . Descibe how the molecular mass of a substance can be determined on the basis of pressrure measurement.

Define the term ' osmotic pressure' . Descibe how the molecular mass of a substance can be determined on the basis of pressrure measurement.

The national income consists of a collection of goods and services reduced to common basis by being measured in terms of money. - Who says this?