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Question

A jar full of whisky contains 40% of alcohol. A part of this whisky is replaced by another containing 19% alcohol and, now the percentage of alcohol was found to be 26. The quantity of whisky replaced is:
  1. 35
  2. 25
  3. 13
     
  4. 23
     


Solution

The correct option is D 23
 
Ratio of alcohol to whiskey in the jar =40:60=2:3.
Ratio of alcohol to whiskey in the new mixture
=26:74=13:37
Now, applying the given alligation method, we have

Ratio of alcohol to whisky in the replaced mixture
=7100:750=1:2
Quantity of whisky replaced =21+2=23.

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