Multiple choice

Two hundred milliliters of pure water is added to 300 milliliters of a solution which is 12% salt. What is the percentage of salt in the resulting solution?

  1. 6.0 %

  2. 6.5 %

  3. 6.9 %

  4. 7.2 %

  5. 7.5 %
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Initial salt = 0.12 * 300 = 36 ml. Total volume = 300 + 200 = 500 ml. New percentage = (36 / 500) * 100 = 7.2%.

AI explanation

The initial 300 ml solution contains 12% salt, resulting in 300 times 0.12, which equals 36 ml of salt. After adding 200 ml of pure water, the new total volume becomes 500 ml. The percentage of salt in the new solution is (36 divided by 500) times 100, which equals 7.2%.

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