The ratio of water in Container A to Container B is 6 : 11. Express A as a fraction of the total.

• Total parts = 6 + 11 = 17
• Container A's share = \(\frac{6}{17}\) of the total

The volume of water in Container A is \(\frac{6}{17}\) of the total volume of water in both containers.

Final Answer: \(\frac{6}{17}\)