There are two vessels A and B which contains mixture of sulphuric acid and nitrous oxide in the ratio of 7 : 2 and 3 : 4 respectively. Mixture of both vessels are mixed to obtain a mixture of 390 ml, in which quantity of nitrous oxide is 160ml. Find ratio of quantity of mixture in vessel A quantity of mixture in vessel B?
1
6 : 7
2
7 : 6
3
14 : 15
4
15 : 14
5
None of these