Study the given bar-graph and answer the question that follows.
The bar-graph shows the sales of books (in thousands) from six branches (B1, B2, B3, B4, B5 and B6) of a publishing company during two consecutive years 2000 and 2001.
The average sales of branches B1, B3 and B6 in 2000 is what percent of the average sales of branches B1, B2 and B3 in 2001?
1
65.25%
2
87.5%
3
80.25%
4
78.5%