How do I prove that there is way that at least $2$ people will sit in front of their own name card?
74695
Rotating a table so that at least two name cards are correct
79686
How can I prove these statements?
29717
Not sure how to go about this group theory proof
61786
How can I have "will call" Greyhound tickets picked up without a photo ID?
151935
Proving the predicate $\forall n \in \mathbb{N} , n \geq 2$ using the Pigeonhole principle
115955
Prove the Probability of Two Events
88110
What are some practices for getting a name change so that people can find me more easily?
108956
Given a probability matrix, find probability that person at zero index can go to other rows
83981
How to prove those "curious identities"?
140364
Covering ten dots on a table with ten equal-sized coins: explanation of proof
127137
Birthday line to get ticket in a unique setup
2251
Can someone give me a hint on how to prove this?
147901
Show that, in a group of n people, everyone has the same number of friends if..
124936
Help with a Probability Proof
54899
How to let random users add a card to a public Trello board?
49928
Proving limit of a sum
96423
Birthday problem with at least 3 people