Quantitative Aptitude :: Alligation or Mixture - Discussion

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Explanation:
Milk in 1 litre mixture in 1st can = 3/4 litre.
Milk in 1 litre mixture in 2n d can = 1/2 litre.
Milk in 1 litre final mixture = 5/8 litre.
By rule of alligation we have required ratio 5 : 8

3/4 1/2



\ /
(5/8)

/ \



1/8 : 1/8

Therefore ratio of two mixtures =1/8:1/8=1:1
So, quantity of mixture taken from each can =(1/2)*12= 6 litres