Probability of being same birthday of at least three people
98096
Group of $r$ people at least three people have the same birthday?
34155
Probability Problem with $n$ keys
84543
Probability of finding a pattern
98435
Probability that a triangle can be formed from a permutation of three edges of random length
104700
suppose $n$ people are in a party and every two of them have exactly one common friends,prove that there is one who is friend to all.
10272
A three-way duel (probability puzzle)
53960
birthday problem - expected number of collisions
113600
Percentage of 2 different Sets of Birthday Out of 14 People
26115
Probability of Birthdays
108956
Given a probability matrix, find probability that person at zero index can go to other rows
58641
Arguments for/against same birthday for siblings?
118407
Birthday Problem applied to collisions
32170
Birthday Problem: How am I wrong?
148382
A family having 4 children has 3 girl children. What is the probability that their 4th child is a son?
32422
What is the probability that there is at least one head and at least one tail?
79493
Probability of 3 people in a room of 30 having the same birthday
100495
Expected number of siblings, given the expectation of children in a family