Question : The following bar graph shows the sales of cell phones (in thousand numbers) from five stores of a company during two consecutive years 2018 and 2019.
What is the ratio of the total sale of store S3 for both years to the total sale of store S1 for both years?
Option 1: 8 : 5
Option 2: 3 : 7
Option 3: 7 : 4
Option 4: 4 : 5
Correct Answer: 8 : 5
Solution :
From the bar graph, the total sales for store S3 for both years is 160 thousand (60 thousand in 2018 and 100 thousand in 2019).
The total sales for store S1 for both years is 100 thousand (40 thousand in 2018 and 60 thousand in 2019).
$\therefore$ The ratio of the total sale of store S3 to the total sale of store S1 for both years = $ \frac{160}{100} = \frac{8}{5}$
Hence, the correct answer is 8 : 5.
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