Combinatorics Problem at a theater
3077
How many ways can we let people into a movie theater if they only have half-dollars and dollars?
132921
Counting problem, number of moves
114792
Mathematical strategy puzzle
78163
Hint for problem on $4 \times 7$-chessboard problem related to pigeonhole principle
144571
A conjecture including binomial coefficients
101758
combinatorics circular arrangement problem
34155
Probability Problem with $n$ keys
23322
Combinatorics Inclusion - Exclusion Principle
37629
Combinatorial card game
32181
A logic puzzle involving a balance.
39163
Combinatorics : Claude wants to invite 5 people to dinner in a pool of 11 friends, but two of these can't be with each other. How many ways?
42270
Combinatorics - Painting the Unit Squares of a 3x3 Square
142978
combinatorics: sum of product of integer compositions
140806
How do I tackle this combinatorics problem about married couples around a table?
41726
Musical and combinatorial proof
26343
Number of certain (0,1)-matrices, Stanley's Enumerative Combinatorics
126543
Combinatorics problem: $n$ people line up to $m$ clubs