Question

The stand how to do solve it

Answer 1

red and blue equals purple right, so u need 20 blue drop and 30 red drops

Answer 2

bearing in mind that

1 Quarter = 2 pints.

1 Gallon = 4 Quarters

1 Gallon = 8 pints.

since the factory is using 3 drops of red for each pint, then each gallon has 3*8 drops, namely 24 drops of red.

and since they're using 2 drops of blue for each pint, then each gallon has 2*8 drops, namely 16 drops of blue.

so on 50 gallons that'd be 24*50 = 1200 of red drops and 16*50 = 800 of blue drops.