How much milk in litres costing Rs 50 per litres should be mixed with 18 litres of milk costing Rs 5...........

Quantitative Aptitude Mixture and Alligation

How much milk (in litres) costing Rs 50 per litres should be mixed with 18 litres of milk costing Rs 56 per litres so that there is a profit of 25% on selling the mixture at Rs 65 per litres?

25 l

32 l

17 l

36 l

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Explanation:

Solution:
CP of mixture = 100/125 * 65 = Rs 52
Let x l of milk to be mixed. So by method of allegation:
(x)……………..…..(18)
50…………………..56
………….52
4……………………..2
So x/18 = 4/2
x = 36 l