What is the ratio of the total sales of branch B2 for both years to the total sales of branch B4 for both years?
Answer: A
Total sales of branch B2 for both years = 75 + 65 = 140 thousand.
Total sales of branch B4 for both years = 85 + 95 = 180 thousand.
The required ratio is 140 : 180.
Dividing both by 20, we get the simplified ratio 7 : 9.