The line chart given below shows the expenditure of two companies J and K in five different years.

L1 - The difference between average expenditure of company J in year A and B and the average expenditure of company K in year C and D.

L2 - The value of average expenditure of company K in all 5 years. What is the value of (L2 - L1)?

490

L1 - The difference between average expenditure of company J in year A and B and the average expenditure of company K in year C and D.

Average expenditure of J in year A & B =  \(\frac{400 + 300 }{2}\) = 350

Average expenditure of K in year C & D =  \(\frac{500 + 300 }{2}\) = 400

L1 = 400 - 350 = 50

L2 - The value of average expenditure of company K in all 5 years.

L2 = \(\frac{1000 + 700 + 500 +300 + 200 }{5}\)

= \(\frac{2700 }{5}\) 

= 540

Now , ( L2 - L1 ) = 540 - 50 = 490