A) 15 : 12
B) 53 : 59
C) 20 : 9
D) 59 : 53
Correct Answer: D
$ \therefore $ Quantity of milk in first vessel $ =\frac{4}{7} $ Quantity of water in second vessel $ =\frac{5}{8} $
$ \therefore $ Quantity of milk in second vessel $ =\frac{3}{8} $ Ratio of water and milk in third vessel $ =,\frac{\frac{3}{7}+\frac{5}{8}}{\frac{4}{7}+\frac{3}{8}}=\frac{24+35}{32+21}=\frac{59}{53} $