A vessel is filled with liquid 4 parts of which are water and 5 parts syrup How much of the mixture ...........

Quantitative Aptitude ( CCS) Mixture and Alligation

A vessel is filled with liquid, 4 parts of which are water and 5 parts syrup. How much of the mixture must be drawn off and replaced with water so that the mixture may be half water and half syrup?

1/9

1/10

1/5

1/12

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Explanation:

Suppose the vessel initially contains 9litres of liquid.
Let x litres of this liquid be replaced with water.
(4-(4x/9) +x) = (5-(5x/9))
X = 9/10
So, part of the mixture replaced = 9/10 * 1/9 = 1/10

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