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Number of ways to make a list for local elections

score 41 · Answer 1 · 2018-01-22 19:13:16

41

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Number of ways to make a list for local elections

Published on 22 Jan 2018 - 19:13

score 3k · Answer 2 · 2026-03-26 12:26:08

3k

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Given a group of 5 women and 4 men, how many different combinations of them exist where all 4 men are kept separate?

Published on 26 Mar 2026 - 12:26

score 2.1k · Answer 3 · 2026-03-29 16:04:56

2.1k

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how to prove that the dual of a matroid satisfies the exchange property?

Published on 29 Mar 2026 - 16:04

score 284 · Answer 4 · 2018-01-22 22:34:44

284

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Combinatoric's Division Rule

Published on 22 Jan 2018 - 22:34

score 80 · Answer 5 · 2018-01-22 22:44:13

80

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Does counting have assumptions?

Published on 22 Jan 2018 - 22:44

score 82 · Answer 6 · 2026-03-22 10:29:43

82

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(Problem Solving) Proving $\sum_{k=0}^{n}(-1)^k\binom{n}{k}\frac{1}{k+m+1}=\sum_{k=0}^{m}(-1)^k\binom{m}{k}\frac{1}{k+n+1}$

Published on 22 Mar 2026 - 10:29

score 583 · Answer 7 · 2026-03-23 09:52:50

583

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Question on proof of Erdos and Szekeres

Published on 23 Mar 2026 - 9:52

score 246 · Answer 8 · 2026-03-25 06:22:13

246

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Finding the number of numbers such that sum of digits is at most $11$

Published on 25 Mar 2026 - 6:22

score 4k · Answer 9 · 2018-01-23 07:15:15

4k

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Nonattacking queens on 3x3 board, why is there no solution?

Published on 23 Jan 2018 - 7:15

score 2k · Answer 10 · 2018-01-23 07:59:57

In how many can $2$ apples, $3$ oranges, and $4$ mangoes be distributed to $3$ children if each child receives at least one fruit?

score 203 · Answer 11 · 2026-03-25 06:22:09

203

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Number of possibilities to choose balls form a container that contains blue, red and black balls

Published on 25 Mar 2026 - 6:22

score 1.5k · Answer 12 · 2026-03-25 06:24:33

1.5k

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Finding Number of Unique Combinations, Multiple n-sizes, Multiple Sets

Published on 25 Mar 2026 - 6:24

score 82 · Answer 13 · 2018-01-23 14:07:57

82

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Let $A=\{1,2,…,6\} , B=\{1,2,…,20\}$. How many functions $f: B\to B$ are there, such that $I_A \subseteq f$ and $f$ is onto?

Published on 23 Jan 2018 - 14:07

score 2.4k · Answer 14 · 2026-03-23 08:53:16

2.4k

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A Gift Problem for the Year 2018

Published on 23 Mar 2026 - 8:53

score 73 · Answer 15 · 2018-01-23 16:35:29

73

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Can this table be filled with only zeros?

Published on 23 Jan 2018 - 16:35

List Question

Number of ways to make a list for local elections

Given a group of 5 women and 4 men, how many different combinations of them exist where all 4 men are kept separate?

how to prove that the dual of a matroid satisfies the exchange property?

Combinatoric's Division Rule

Does counting have assumptions?

(Problem Solving) Proving $\sum_{k=0}^{n}(-1)^k\binom{n}{k}\frac{1}{k+m+1}=\sum_{k=0}^{m}(-1)^k\binom{m}{k}\frac{1}{k+n+1}$

Question on proof of Erdos and Szekeres

Finding the number of numbers such that sum of digits is at most $11$

Nonattacking queens on 3x3 board, why is there no solution?

In how many can $2$ apples, $3$ oranges, and $4$ mangoes be distributed to $3$ children if each child receives at least one fruit?

Number of possibilities to choose balls form a container that contains blue, red and black balls

Finding Number of Unique Combinations, Multiple n-sizes, Multiple Sets

Let $A=\{1,2,…,6\} , B=\{1,2,…,20\}$. How many functions $f: B\to B$ are there, such that $I_A \subseteq f$ and $f$ is onto?

A Gift Problem for the Year 2018

Can this table be filled with only zeros?

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