Question
The Jar contains only 8 litres of milk and the rest is
water. A new mixture in which concentration of milk is 30%, is to be formed by replacing the Jar mixture. How many litres of mixture shall be replaced with pure milk if there was initially 32 litres of water in the mixture?Solution
Milk : water 8 : 32 Ratio = 1:4 Initial mixture = 8 + 32 = 40 litres Using Allegation method, 
Initial Mixture = 8 unit → 40 litres 1 unit = 5 litre The mixture of water and milk is replaced by 5 litres.
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