In three vessels, the ratio of water and milk is 6 : 7, 5 : 9 and 8 : 7, respectively. If the mixtures of the three vessels are mixed together, then what will be the ratio of water and milk?
2431 : 3781
3691 : 4499
4381 : 5469
None of these
Quantity of water in the mixture = (6/5) + (5/14) + (8/15)
= (1260+975+1456)/2730
= 3691/2730
Quantity of milk in the mixture = (7/5) + (9/14) + (7/15)
= (1470 + 1755 + 1274)/ 2730 = 4499/2730
So required ration = 3691 : 4499