What is the respective ratio between total number of books p

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What is the respective ratio between total number of books purchased for libraries A and B together in 2003 and total number of books purchased for the same libraries together in 2007 -

[IBPS PO 2017 With Answers]

A 22 : 31

B 24 : 31,

C 11 : 17,

D 11 : 19,

E 22 : 35