What percentage of the original dye remains after draining 15% of the solution?

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Multiple Choice

What percentage of the original dye remains after draining 15% of the solution?

Explanation:
Uniform distribution and proportional removal: when you drain 15% of the solution, you remove the same fraction of dye if the dye is evenly mixed. That leaves 85% of the original dye behind. So 85% remains. The other numbers would imply removing different fractions of dye than 15% (which would only happen if the dye weren’t evenly mixed).

Uniform distribution and proportional removal: when you drain 15% of the solution, you remove the same fraction of dye if the dye is evenly mixed. That leaves 85% of the original dye behind. So 85% remains. The other numbers would imply removing different fractions of dye than 15% (which would only happen if the dye weren’t evenly mixed).

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