Subject: General Aptitude · Chapter: Alligation or Mixture · Exam: · Marks: · Difficulty:
Two vessels A and B contain milk and water mixed in the ratio 8 : 5 and 5 : 2 respectively. The ratio in which these two mixtures be mixed to get a new 3 mixture containing 69 % milk, is 13
(a)2 : 7
(b)3 : 5
(c)5 : 2
(d)5 : 7
Answer
Answer (as printed):
Explanation
Let cost of 1 litre milk be ` 1. 8 Milk in 1 litre mix. in A = litre, 13 8 C.P. of 1 litre mix. in A = ` . 13 5 Milk in 1 litre mix. in B = litre, 7 5 C.P. of 1 litre mix. in B = ` . 7 900 1 9 Milk in 1 litre of final mix. = × ×1 = litre; 13 100 13 9 Mean price = ` . 13 QUANTITATIVE APTITUDE By the rule of alligation, we have : C.P. of 1 litre C.P. of 1 litre mixture in A mixture in B 8 5 Mean price 13 7 9 13 2 1 91 13 2 1 ∴ Required ratio = : = 2 : 7. 91 13
Explanation as extracted from the printed page; notation may be imperfect.