Refer to the graph and answer the given questions.
Data related to number of bags sold by two stores (M and N) during 5 years :
What is the respective ratio between total number of bags sold by stores M and N together in 2009 and that in 2010?
Total no. of bags sold by M & N in 2009 = 310+170 = 480
Total no. of bags sold by M & N in 2010 = 380+300 = 680
Required ratio = 480/680 = 12:17
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