Count the ways to select 12 coins from 5 identical bins
33219
There are five boxes consisting of several identical coins.
136449
Combinatorics problem on $20$ people, $12$ months, and distinguishable groups
133040
Rolling a die 100 times and probability of product of results
58606
Calculating optimal number of bins in a histogram
67817
Number of ways to distribute 5 distinguishable balls between 3 kids such that each of them gets at least one ball
70354
Find the sum of all the multiples of 3 or 5 below 1000
61681
How to calculate the probability of rolling 6 at least 5 times in a row, out of 50 tries?
130514
best way to pick a random subset from a collection?
76369
Retrieving the top 100 numbers from one hundred million of numbers
97265
count the ways to fill a $4\times n$ board with dominoes
138732
How to replace multiple items with same count of a different item?
62371
Expected number of times a set of 10 integers (selected from 1-100) is selected before all 100 are seen
10018
Tossing a fair coin until two consecutive tosses are the same
114927
How to implement Bitcount using only Bitwise operators?
37115
another balls and bins question
104704
Evaluate $\sum\limits_{k=0}^n \binom{n}{k}$ combinatorially
134599
How do I do Combinatorics / Counting?