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Question

Two vessels A and B contain spirit and water in the ratio 5 : 2 and 7 : 6 respectively. Find the ratio in which these mixture be mixed to obtain a new mixture in vessel C containing spirit and water in the ration 8 : 5.
  1. 3: 4
  2. 4: 3
  3. 9: 7
  4. 7: 9


Solution

The correct option is D 7: 9
Fraction of spirit in vessel A=57=6591
Fraction of spirit in vessel B=713=4991
Fraction of spirit required in the final mixture =813=5691

Required ratio is 7: 9

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