Subject: General Aptitude · Chapter: Alligation or Mixture · Exam: · Marks: · Difficulty:
The respective ratio of milk and water in the mixture is 4 : 3 respectively. If 6 Litres of water is added to this mixture, the respective ratio of milk and water becomes 8 : 7. What is the quantity of milk in the original mixture? [IBPS—RRB Office Assistant (Online) Exam, 2015]
(a)36 litres
(b)84 litres
(c)48 litres
(d)None of these
Answer
Answer (as printed):
Explanation
Let the quantity of milk and water in initial mixture be 4x and 3x liters. Quantity of water = 3x liters On adding 6 liters of water, we get 4x 8 = 3x + 6 7 ⇒ 28x = 24x + 48 ⇒ 28x – 24x = 48 ⇒ 4x = 48 48 ⇒ x= = 12 4 ∴ Required quantity of milk = 4x = 4 × 12 = 48 liters.
Explanation as extracted from the printed page; notation may be imperfect.