Question

Combination question, number of ways 5 men and 5 women can marry

score 166 · Answer 1 · 2019-02-09 16:02:50

166

Views

Combination question, number of ways 5 men and 5 women can marry

Published on 09 Feb 2019 - 16:02

score 1.2k · Answer 2 · 2026-02-23 05:14:18

1.2k

Views

Given $N$ slots and $S$ objects to fill those slots, how many ways are there to fill the slots such that no two objects are adjacent.

Published on 23 Feb 2026 - 5:14

score 26 · Answer 3 · 2019-02-11 04:49:03

26

Views

Finding the number of combinations under group restrictions

Published on 11 Feb 2019 - 4:49

score 37 · Answer 4 · 2019-02-11 13:25:47

37

Views

Is there a term for permutations where the elements are optionally included?

Published on 11 Feb 2019 - 13:25

score 549 · Answer 5 · 2019-02-11 13:53:53

549

Views

Paths on a grid and how many

Published on 11 Feb 2019 - 13:53

score 112 · Answer 6 · 2026-03-26 06:21:31

112

Views

In a word containing $k$ A's, how many permutations place at least $n$ A's consecutively?

Published on 26 Mar 2026 - 6:21

score 30 · Answer 7 · 2019-02-12 13:23:30

30

Views

Finding optimal subset of items with a blackbox reward function

Published on 12 Feb 2019 - 13:23

score 79 · Answer 8 · 2026-02-23 04:50:15

79

Views

Weird lottery proabablity question

Published on 23 Feb 2026 - 4:50

score 947 · Answer 9 · 2026-03-26 12:07:43

947

Views

can we perform modulo operator on a fraction on both of it's numerator and denominator?

Published on 26 Mar 2026 - 12:07

score 383 · Answer 10 · 2026-03-28 02:48:46

383

Views

Combinations with Piano Keys

Published on 28 Mar 2026 - 2:48

score 3.4k · Answer 11 · 2019-02-13 16:21:36

3.4k

Views

Number of combinations for a 4-character password with particular rules

Published on 13 Feb 2019 - 16:21

score 2.5k · Answer 12 · 2019-02-13 18:25:06

2.5k

Views

Find the total number of 20 digit codes that can be formed using the numbers {0,1,2,3,4}, such that consecutive digits have a difference of 1?

Published on 13 Feb 2019 - 18:25

score 295 · Answer 13 · 2026-03-25 22:26:03

295

Views

Prove the identity $\binom{2n}{2}$ = $\binom{n}{2}+\binom{n}{n-2}+n^2$ where $n\geq2$ using a combinatorial proof.

Published on 25 Mar 2026 - 22:26

score 280 · Answer 14 · 2019-02-14 13:17:08

280

Views

Can you keep this raffle fair?

Published on 14 Feb 2019 - 13:17

score 595 · Answer 15 · 2026-03-26 07:59:20

595

Views

Variance and mean of balls in bins limited capacity

Published on 26 Mar 2026 - 7:59

List Question

Combination question, number of ways 5 men and 5 women can marry

Given $N$ slots and $S$ objects to fill those slots, how many ways are there to fill the slots such that no two objects are adjacent.

Finding the number of combinations under group restrictions

Is there a term for permutations where the elements are optionally included?

Paths on a grid and how many

In a word containing $k$ A's, how many permutations place at least $n$ A's consecutively?

Finding optimal subset of items with a blackbox reward function

Weird lottery proabablity question

can we perform modulo operator on a fraction on both of it's numerator and denominator?

Combinations with Piano Keys

Number of combinations for a 4-character password with particular rules

Find the total number of 20 digit codes that can be formed using the numbers {0,1,2,3,4}, such that consecutive digits have a difference of 1?

Prove the identity $\binom{2n}{2}$ = $\binom{n}{2}+\binom{n}{n-2}+n^2$ where $n\geq2$ using a combinatorial proof.

Can you keep this raffle fair?

Variance and mean of balls in bins limited capacity

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