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Answer : 1 80% Explanation : Answer: A) 80% Explanation: Water in 60 gm mixture=60 x 75/100 = 45 gm. and Milk = 15 gm. After adding 15 gm. of water in mixture, total water = 45 15 = 60 gm and weight of a mixture = 60 15 = 75 gm. So % of water = 100 x 60/75 = 80%.

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