The bar graph given below shows the sales of books (in 1000s) from six branches of a publishing company during two consecutive years 2006 and 2007.
Sales of Books (in thousand numbers) from Six Branches A1, A2, A3, A4, A5 and A6 of a publishing Company in 2006 and 2007.
What is the ratio of the total sales of branch A2 for both years to the total sales of branch A4 for both years?
1
7 : 9
2
6 : 7
3
5 : 7
4
8 : 9
5
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