Maria painted 3/4 of a wall white. She painted 1/3 of the remaining part of the wall red. What fraction of the wall is painted red?
First, we need to find out what fraction of the wall is not painted white. Since Maria painted 3/4 of the wall white, the remaining part is 1 - 3/4 = 1/4.
Next, we need to find out what fraction of the wall Maria actually painted red. She painted 1/3 of the 1/4 remaining part, which is equal to 1/3 x 1/4 = 1/12.
Therefore, the fraction of the wall that is painted red is 1/12. Answer: \boxed{\frac{1}{12}}.