Bar Charts - General Aptitude

Q1:

What is the approximate difference between the average sales turnover of all the companies put together between the years 2001 - 2002 and 2002 - 2003 ?

A 133.45

B 142.48

C 117.6

D None of these

ANS:B - 142.48

Difference between the sum of the two years divided by 5.