Question

Two containers of the same volume are 40% and 50% full of water, respectively. They are then filled completely with milk. If the contents of both containers are mixed in a larger vessel, what is the percentage of milk in the final mixture?

• A. 45%
• B. 60%
• C. 55%
• D. 50%

Answer 1

Answer:

C. 55%

Let the volume of each container be 100 units.

Container 1

• Water = 40 units

• Milk = 60 units

Container 2

• Water = 50 units

• Milk = 50 units

After mixing

Total volume:

100 + 100 = 200
Total milk:

60 + 50 = 110
Percentage of milk in the final mixture:

$\frac{110}{200}\times 100 = 55\%$

Percentage of milk in the final mixture = 55%.