Word problem based on Facebook statuses and probabality/combinatorics.

read more- Okay. Let's say that you see one of your friends' statuses.
- And, 5 people like the status.
- And you observe that it just says "5 people like this".
- So, you don't know who those people are.
- Assuming that only that person's friends can "like" his status, what's the probability that you are friends with those people?
- All of them, 4 of them, 3 of them, etc.