We’re not actively looking for WitCHes right now, since we have a huge backlog to update. This one, however, came up in another context and, after chatting about it with commenter Red Five, there seemed no choice.
The problem was to determine Pr(X > 0), the possible answers being
A. 2/3 B. 3/4 C. 4/5 D. 7/9 E. 5/6