Probability of choosing N out of K correctly from a total population of X
51981
What is the probability of n people from a list of m people being in a random selection of x people from a list of y people?
94388
SAT Probability and Counting
28183
Probability of selecting an even natural number from the set $\Bbb N$.
147428
Probability of picking an odd number from the set of naturals?
68507
Random number generation and probability
47240
An alternate solution to the hat-matching problem, probability of exactly $k$ matches
101034
What's the probability that a given permutation has exactly $k$ fixed points.
143132
How to reverse the $n$ choose $k$ formula?
157228
Could someone help me check my answer on this probability question?
112897
Weighted random selection with and without replacement
64511
A weighted version of random.choice
3786
Help finding a combinatorial proof of $k {n \choose k } = n {n - 1 \choose k -1}\;$
40439
about a difficult and weird Probability question
113040
Normal approximation to the binomial distribution
136686
Find the almost sure limit of $X_n/n$, where each random variable $X_n$ has a Poisson distribution with parameter $n$
23882
What are the chances of getting $K$ identical outcomes in a row in a series of $Y$ independent events?
54442
Sum of $k {n \choose k}$ is $n2^{n-1}$