Wipro Company Numerical Ability Alligation or Mixture

4 litres of a 20% solution of alcohol in water is mixed with 6 litres of an 80% solution of alcohol in water. What is the strength of alcohol in the resulting mixture?
A. 52%
B. 50%
C. 56%
D. 60%
E. None of these

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Wipro Other Question
Two equal glasses filled with mixture of milk and water in the proportions of 2:1 and 1:1 respectively are emptied into a third glass. What is the proportion of milk and water in the third glass?
A. 7:3
B. 5:7
C. 3:7
D. 7:5
E. None of these 1 litre of water is added to 5 litres of a 20% solution of alcohol in water. The strength of alcohol is now?
A. 16.67%
B. Unaltered
C. 10%
D. 5%
E. None of these