Previous Year Questions

From (A)

Quantity of milk in the initial mixture = 7/12 x 84 = 49 litres

Quantity of water in the initial mixture = 5/12 x 84 = 35 litres

Quantity of milk in the remaining mixture = 49 - 7/12 x 36

= 49 - 21

= 28 litres

Quantity of water in the remaining mixture = 35 - 5/12 x 36

= 35 - 15

= 20 litres

Quantity of milk in the final mixture = 28 + 5 = 33 litres

Quantity of water in the final mixture = 20 + 2 = 22 litres

Milk : Water = 33 : 22 = 3:2 ≠ 4:3

From (B)

Quantity of milk in the initial mixture = 7/12 x 108 = 63 litres

Quantity of water in the initial mixture = 5/12 x 108 = 45 litres

Quantity of milk in the remaining mixture = 63 - 7/12 x 36

= 63 - 21

= 42 litres

Quantity of water in the remaining mixture = 45 - 5/12 x 36

= 45 - 15

= 30 litres

Quantity of milk in the final mixture = 42 + 5 = 47 litres

Quantity of water in the final mixture = 30 + 5 = 35 litres

Milk : Water = 47:35 ≠ 4:3

From (C)

Quantity of milk in the initial mixture = 7/12 x 144 = 84 litres

Quantity of water in the initial mixture = 5/12 x 144 = 60 litres

Quantity of milk in the remaining mixture = 84 - 7/12 x 36

= 84 - 21

= 63 litres

Quantity of water in the remaining mixture = 60 - 5/12 x 36

= 60 - 15

= 45 litres

Quantity of milk in the final mixture = 63 + 5 = 68 litres

Quantity of water in the final mixture = 45 + 3 = 48 litres

Milk : Water = 68:48 = 17:12 ≠ 4:3

From (D)

Quantity of milk in the initial mixture = 7/12 x 96 = 56 litres

Quantity of water in the initial mixture = 5/12 x 96 = 40 litres

Quantity of milk in the remaining mixture = 56 - 7/12 x 36

= 56 - 21

= 35 litres

Quantity of water in the remaining mixture = 40 - 5/12 x 36

= 40 - 15

= 25 litres

Quantity of milk in the final mixture = 35 + 5 = 40 litres

Quantity of water in the final mixture = 25 + 5 = 30 litres

Milk : Water = 40:30 = 4:3