Alligation or Mixture problems
In what ratio must water be added to spirit to gain 25% by selling it at cost price?

4 : 3
1 : 4
3 : 4
4 : 1

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Alligation or Mixture problems
640 ml of a mixture contains milk and water in ratio 6:2. How much of the water is to be added to get a new mixture containing half milk and half water?

320 ml
360 ml
330 ml
310 ml

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