$n$ men and $n$ women form a queue, how many ways are there so that for every man, there are more women in front of him?
140416
Catalan number - combinatoric
108747
A simple permutation question - discrete math
140806
How do I tackle this combinatorics problem about married couples around a table?
51981
What is the probability of n people from a list of m people being in a random selection of x people from a list of y people?
142817
Probability of people attending same and different places
13860
IMO/1981 - Combinatorics
134938
Committee combinatorics
14409
A problem about function N
144079
Find Total number of ways out of N Number taking K numbers every M interval
140632
A problem on Binomial Theorem
18881
Number of elements of order $7$ in a group
126543
Combinatorics problem: $n$ people line up to $m$ clubs
27263
How many ways can $b$ balls be distributed in $c$ containers with no more than $n$ balls in any given container?
1513
In how many ways can n couples (husband and wife) be arranged on a bench so no wife would sit next to her husband?
107010
How many elements of order $k$ are in $S_n$?
134599
How do I do Combinatorics / Counting?
87431
$n-$circular arrangement problem