Correct Answer - Option 1 : 44 litres

**Given:**

Initial quantity of mixture = 80 litres

Ratio of milk and water in the initial mixture = 2 : 3

Amount of mixture replaced with milk = 25%

**Concept used:**

If a fraction of mixture is removed from the mixture, then the ratio of milk and water will be same as previous.

**Calculations:**

Amount of mixture replaced with milk = 25% × 80

⇒ 20 litres

After removing 20 litres,

Ratio of milk and water in the remaining mixture of 60 litres will be in the ratio of 2 : 3

Let amount of milk and water be 2x and 3x litres respectively.

⇒ 2x + 3x = 60

⇒ 5x = 60

⇒ x = 12

New amount of milk = 2x

⇒ 2 × 12

⇒ 24 litres

New amount of water = 3x

⇒ 3 × 12

⇒ 36 litres

New amount of water = 36 litres

After adding 20 litres of milk in the new mixture,

New amount of milk in the final mixture = 24 + 20

⇒ 44 litres

**∴ The amount of milk in the final mixture is 44 litres.**