1.

50 litres of mixture of alcohol and water is in the ratio of 1 : 4 respectively. If 10 litres of mixture is taken off and replaced with 10 litres of water. Then what is the new ratio of alcohol and water respectively?

A. 1 : 4
B. 2 : 11
C. 1 : 5
D. 4 : 21
Answer» E.


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