Probability of no mutual friends between two groups of n people
134440
An unexpected application of non-trivial combinatorics
107193
Exact probability of random graph being connected
115019
Roll an n-sided die m times. What is the probability that (1, 2, 3 .... n) faces have appeared?
102828
Conditional Probability with boys and girls
34155
Probability Problem with $n$ keys
150679
Number of n-words such that a and b are not neighbors.
39005
Probability that a number has $m$ indistinct factors
82208
Finding n using central limit theorem
92477
How many combinations of groups are there where no member of a group has been with another member before?
98096
Group of $r$ people at least three people have the same birthday?
110436
ways to select a non-empty subset of these people, such that no two adjacent people are selected.
39287
Probability with same number of heads and tails
79493
Probability of 3 people in a room of 30 having the same birthday
50179
Probability of two people meeting
77056
A very easy probability problem but opinions diverge greatly. Need some help.
123137
Recursion: putting people into groups of 1 or 2
15558
Zero probability and impossibility