I like puzzles that are simple to state and understand. This one is not too difficult.
“There are three boxes. One contains apples. One contains oranges. One contains both apples and oranges.
However, the boxes are mislabeled. One is labeled apples, but contains either oranges or the mix. One is labeled oranges, and contains apples or the mix. And the box labeled Both contains apples or oranges, but not both.
Removing only one piece of fruit from one box, how can you correctly identify all three boxes?”