A litre of pure alcohol is added to 6 litres of 30% alcohol solution. The percentage of water in the solution is
Options:
A . 40%
B . 50%
C . 65%
D . 60%
Answer: Option D Answer: (d)In 30% alcohol solution, Alcohol = $30/100 × 6$ =1.8litres Water = 4.2 litres On mixing 1 litre of pure alcohol, Percentage of water =$4.2/7 × 100$ = 60%
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