Two vessels A and B contains water and alcohol in the ratio 1 : 4 and 4 : 5. In what ratio these mixture to be mixed in vessel C so that the ratio of water and alcohol in the vessel C be 2 : 3. 

1
9 : 2
2
3 : 7
3
2 : 9
4
7 : 3
5
1 : 1 

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