Tag: permutations
Interview Questions
- 100 prisoners and 100 boxes
- Send a secret hour using four books on a shelf
- Count ordered ways to reach a target
- All orderings to execute a basket of trades
- Six rolls, all six faces
- Probability exactly one person gets their own hat
- Expected number of people who get their own hat
- Count the derangements of five items
- Chance that at least one card matches between two decks
- Probability nobody gets their own hat
- A four-digit PIN with no repeated digit
- Expected number of hat matches
- Expected number and variance of mutual hat swaps
- Variance of the number of hat matches
- Will the three A's clump together?