Alla and balla together drink 750ml of water. of alla drinks 50% more than balla how much does alla drink

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  450 mL

Step-by-step explanation:

The ratio of drink amounts can be written as ...

  Alla : Balla = 1.50 : 1 = 3 : 2

Then the total of ratio units is 3+2=5, and each one represents 750 mL/5 = 150 mL.

Alla drinks 3 ratio units of water, or 3·150 mL.

Alla drinks 450 mL of water.

I believe that the answer is 328 times 4 = x, where x is the total number of water bottles needed.