The bar graph given below shows the expenditure of two companies A and B in different years.

T1 = The average expenditure of company A and B in year Y1.

T2 = The average expenditure of company A and B in years Y5.

What is the value of (T1- T2 )?

400

T1 = The value of average production of A and B in Y1

= \(\frac{2000 + 800}{2}\) = 1400

T2 = The value of average production of A and B in Y5

= \(\frac{1600 + 400}{2}\)  = 1000

Now , (T1 - T2) = 1400 - 1000 = 400