Multiple choice

A mixture of alcohol and water contains 35% alcohol by weight. If 25 g water is added to such a mixture of 100 g, then the percentage of alcohol in the mixture is

  1. 25%

  2. 28%

  3. 30%

  4. 32%
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Initial mixture: 100g total, 35% alcohol = 35g alcohol, 65g water. Add 25g water: New total = 125g, alcohol = 35g. New percentage = (35 / 125) * 100 = 28%.

AI explanation

In the original 100 g mixture, the amount of alcohol is 35% of 100 g, which equals 35 g. After adding 25 g of water, the new total weight of the mixture becomes 125 g. The percentage of alcohol in the new mixture is (35 g divided by 125 g) multiplied by 100, yielding 28%.

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