Question

In three vessels each of 10 litres capacity, mixture of milk and water is filled, the ratios of milk and water are 2:1, 3:1 and 3:2 in the three respective vessels, of all the three vessels are emptied into a single large vessel, find the proportion of milk and water in the mixture

Answer 1

add up all numerators and denominators
so 2+3+3 : 1+1+2
=8:4
=2:1ratio

Answer 2

Answer : Milk : Water

Vessel 1     (2 : 1 = 3 )* 20  => 40:20

Vessel 2     (3 : 1 = 4 )* 15   => 45:15

Vessel 3     (3 : 2 = 5 )* 12  => 36:24

Total=======>  Milk : Water => 121 : 59