The bar graph given below shows the sales of books (in thousand numbers) from six branches of a publishing company during two consecutive years 2000 and 2001.
Common Information Question: 3/5
What percent of the average sales of branches $B1$, $B2$ and $B3$ in 2001 is the average sales of branches $B1$, $B3$ and $B6$ in 2000?
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