CAT Practice : Averages, Ratios, Mixtures

When we mix two mixtures in a particular ratio, we get a third mixture. Given the third mixture how does one find the ratio in which they were mixed.

Alligation

    Q.32: A mixture of 40 litres of milk and water, contains 20% of water. How much water must be added to the above mixture to make the water 25% of the resultant mixture?
    1. 3 l
    2. 2.33 l
    3. 2.67 l
    4. 4 l

 

  • Correct Answer
    Choice C. 2.67 l

Detailed Solution

Focus on water since it is the item of interest in the question.
Therefore,

Therefore,
Mixture: Water = 15:1 = ) litres of water must be added = 2.67 l




Correct Answer: 2.67 l



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