Category
page 1Probability problems
Monty Hall problem
mathematical problem
birthday problem
mathematical problem
Buffon's needle
question in geometric probability
coupon collector's problem
probability Theory
secretary problem
mathematical problem
Sleeping Beauty problem
mathematical problem
two envelopes problem
brain teaser, puzzle, or paradox in logic, probability, and recreational mathematics
Boy or Girl paradox
paradox in probability theory
German tank problem
estimating the maximum of a discrete uniform distribution from sampling without replacement, historically from predicting German tank production based on ascending serial numbers in tanks lost in combat

problem of points
problem about a game of chance with 2 players who agree in advance that the 1st player to have won N rounds will collect a prize; if the game is interrupted before either player has won N rounds, how should one divide the prize?
Bertrand's ballot theorem
theorem that, in an election where candidate A receives 𝑝 votes and candidate B receives 𝑞 votes (𝑝>𝑞), the probability that A will be strictly ahead of B throughout the count is (𝑝−𝑞)/(𝑝+𝑞)
Three Prisoners problem
mathematical problem
Gambler's ruin
concept of probability theory and gambling
urn problem
certain model studied in probability theory and combinatorics
Bertrand's box paradox
mathematical paradox
moment problem
trying to map moments to a measure that generates them
Newton–Pepys problem
probability problem
Banach's matchbox problem
problem in probability: Banach has 2 matchboxes (initially with 𝑁 matches) in left and right pockets; if he reaches into his pocket and finds for the 1st time that the box picked is empty, what’s the probability that there are 𝑘 matches in the other?