Answer: 24 quarts of blue paint
Explanation:
1. divide both 3/4 and 6 by 2 to get 1/4 and 2
2. multiple both by 4 to get 1 and 8
3. you have 1 cup of black paint per 8 quarts of blue paint.
4. multiply by 3 to get 3 cups of black paint and 24 quarts of blue paint