Find the number of persons who will go to the party
72874
GCSE: Find the number of person that will go to a party
93921
Select groups based on number of unique / distinct values
142797
Probability that two people share the same birthday?
141800
Peer to Peer: Methods of Finding Peers
153218
If $m$ tickets are drawn out of $n$ tickets numbered $1$ to $n$, find variance of the sum of the numbers on tickets
102893
Help finding probability generating function
30190
Find children of the process
103089
Count and use the number of items in advance
11679
Selecting a security team that includes at most one of the oldest man or oldest woman
107964
Simple combinatorics problem.
109273
Extending the birthday paradox to more than 2 people
127356
Using Count to find the number of occurrences
114741
Probability of N unrelated events, each with different probabilities, what is the chance X number of outcomes occur
111324
Finding number of relations on a set with 3 elements
12620
A method to count occurrences in a list
120704
How do you show a list of attendees in an Outlook 2013 calendar event?
29638
Count number of occurences for each unique value