Subject: General Aptitude · Chapter: Alligation or Mixture · Exam: · Marks: · Difficulty:
One quality of wheat at ` 9.30 per kg is mixed with another quality at a certain rate in the ratio 8 : 7. If the mixture so formed be worth ` 10 per kg, what is the rate per kg of the second quality of wheat ?
(a)` 10.30
(b)` 10.60
(c)` 10.80
(d)` 11
Answer
Answer (as printed):
Explanation
Let the rate of the second quality be ` x per kg. By the rule of alligation, we have : C.P. of 1 kg wheat of C.P. of 1 kg wheat of 1st kind 2nd kind 930 p (100 x) p Mean price 1000 p (100 x – 1000) p 70 p 100 x – 1000 8 ∴ = ⇒ 700 x – 7000 70 7 = 560 ⇒ 700 x = 7560 ⇒ x = ` 10.80.
Explanation as extracted from the printed page; notation may be imperfect.