Initial quantity of milk = 60 litres When 12 liters of milk taken out from it and replaced by water, then quantity of milk = 60 - 12 = 48 litres and water = 12 litres (Total mixture still remains 60 litres) Again, 12 litres of mixture istaken out, ⇒ Fraction of mixture taken out =
12
60
=
1
5
th ⇒ Milk left = 48−(
1
5
×48)=38.4 litres ⇒ Water left = 60−38.4=21.6 litres ∴ Required ratio =