combinatorics. how many options to make a ticket?
6138
Combination of a 4-digit number
23322
Combinatorics Inclusion - Exclusion Principle
39724
Combinatorial Identities
37629
Combinatorial card game
97265
count the ways to fill a $4\times n$ board with dominoes
76405
Let n be an even integer. How many different ways can I choose subsets of the set {1,2...,n}
3786
Help finding a combinatorial proof of $k {n \choose k } = n {n - 1 \choose k -1}\;$
65307
Simple combination/probability question based on string-length and possible-characters
81167
How many ways can the average of n dice be a?
85104
Counting train stops using combinatorics
42062
Interpretation of a combinatorial expression
9971
enumerative combinatorics,In how many ways (as a function of n) can one choose a composition α α of n
36287
How to create all possible permutations?
39872
Good Book On Combinatorics
8049
Generating Combinations
68882
Path to Combinatorics Problem [$1.11$]
65843
Number of possible combinations of x numbers that sum to y