Mixture and Alligation

Quantitative Aptitude (CHSL)

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A vessel is filled with liquid, which is 3 parts water and 5 parts milk. How much of the liquid should be drawn of and replaced by water to make it half water and half milk?

1/8

1/5

2/3

2/7

Explanation:

Solution:
Suppose the vessel initially contains 8 litres of liquid.
Let x litres of this liquid be replaced with water.
water in new mixture =(3-3x/8+x)
syrup in new mixture =(5-5x/8)
Then (3-3x/8+x) = (5-5x/8)
5x + 24 = 40 – 5x
10x=16==>x=8/5
So part of mixture replaced is 8/5*1/8=1/5

By: Pranav Gupta

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