In a warehouse there are three closed boxes. One contains only apples, one contains only pears, and the third contains a mix of apples and pears.

The boxes are labeled:
Unfortunately, every single label is wrong (all are mixed up/swapped). You are allowed to take exactly one piece of fruit from just one box, without looking inside beforehand.
How can you then correctly label all three boxes?
⇩ Here you can download the puzzle (incl. solution).
Do you like the puzzle with the boxes? Do you know other exciting brain teasers? Feel free to leave a comment.