Alligation or Mixture problems
A mixture contains 25% milk and rest water. What percent of this mixture must taken out and replaced with milk so that in mixture milk and water may become equal.

31.8%
31%
33.33%
29.85%

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Alligation or Mixture problems
The average monthly salary of employees, consisting of officers and workers, of an organisation is Rs. 3000. The average salary of an officer is Rs. 10,000 while that of a worker is Rs. 2000 per month. If there are total 400 employees in the organisation, find the number of officers and workers separately.

250 , 150
50 , 350
310 , 90
300 , 100

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