Multiple choice

A vessel contains 80% milk solution. 25% of the contents of the vessel is removed and replaced by water. Then 20% of the contents of the vessel is removed and replaced by water. Finally, 10% of the contents of the vessel is removed and replaced by water. What will be the final concentration of milk in the solution?

  1. 48%

  2. 60%

  3. 44.5%

  4. 43.2%
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Starting with 100 units of 80% milk (80 units). After 25% removal, 75% remains: 80 * 0.75 = 60. After 20% removal, 80% remains: 60 * 0.8 = 48. After 10% removal, 90% remains: 48 * 0.9 = 43.2.

AI explanation

The final concentration is found by multiplying the initial concentration by the remaining percentages after each successive replacement. The calculation is 80 percent multiplied by 0.75, then by 0.80, and finally by 0.90. This results in 80 multiplied by 0.75 equaling 60, then 60 multiplied by 0.8 equaling 48, and 48 multiplied by 0.9 resulting in 43.2 percent.

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