Directions: Study the following bar graph and answer the question that follows:
Sales of books (in thousands) from 5 branches (C1, C2, C3, C4 & C5) of a publishing company for the two successive years 2010 and 2011. What is the average sales of all the branches (in thousands) for the year 2010?
1
74
2
78
3
72
4
76