The line chart given below shows the income and expenditure of a company in five years.

Saving = Income - Expenditure

What is the difference between the average income and average saving in year C and D together ?

150

Average income of C & D = \(\frac{600 + 400}{2}\)  = 500

Saving of C = 600 - 200 = 400 & Saving of D = 400 - 100 = 300

Average saving of C & D = \(\frac{400 + 300}{2}\)  = 350

Required Difference = 500 - 350 = 150