Mixture and Alligation

Quantitative Aptitude (CDS)

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How much milk (in litres) costing Rs 60 per litres should be mixed with 35 litres of milk costing Rs 84 per litres so that there is a profit of 50% on selling the mixture at Rs 111 per litres?

25 l

32 l

17 l

36 l

Explanation:

CP of mixture = 100/150 * 111 = Rs 74
Let x l of milk to be mixed. So by method of allegation:
(x)……………..…..(35)
60…………………..84
………….74
10……………………..14
So ratio is 10 : 14 = 5 : 7
So x/35 = 5/7
x = 25 l

Hence, option 1 isthe correct answer.

By: Amit Kumar

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