Question

which is a better estimate for the volume of a bathroom sink? 27 pints 27 fluid ounces

Explanation:

1 fluid ounce is a very small volume (about a shot glass), so 27 fluid ounces is only ~3.375 cups, far too small for a bathroom sink. A pint is 16 fluid ounces, so 27 pints equals 432 fluid ounces (or ~54 cups), which is a reasonable estimate for the volume of a typical bathroom sink that can hold enough water for washing hands/face.

Answer:

27 pints