Actually this is a little simpler than that :wink: 

If I have the three buckets, and I _know_ that the labels are wrong, I should be able to get it in (at most) two tries. I'm going to use apples and oranges (I can't remember the example off the top of my head). Try thinking about it this way: 

1 try:
Case: Pull an apple out of a bucket labeled 'apples'. 

2 tries:
Case: Pull an orange out of a bucket labeled 'apples'.