Question

Constrained combinatorial question: 2 types of balls divided into k groups with limits

score 190 · Answer 1 · 2026-04-11 01:51:08

190

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Constrained combinatorial question: 2 types of balls divided into k groups with limits

Published on 11 Apr 2026 - 1:51

score 79 · Answer 2 · 2026-03-29 02:30:33

79

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Probability of containing N distinct elements in a multiset?

Published on 29 Mar 2026 - 2:30

score 121 · Answer 3 · 2026-03-29 05:12:16

121

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Error in calculation of number of ways to put $20$ identical balls in $4$ labelled boxes if each box contains at most $18$ balls

Published on 29 Mar 2026 - 5:12

score 65 · Answer 4 · 2026-04-11 00:42:39

65

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Help constructing a counterexample subset of a non-abelian group

Published on 11 Apr 2026 - 0:42

score 116 · Answer 5 · 2018-11-11 14:07:26

116

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Show that $1.222 \le 1 + 3^{-2} + 5^{-2} + ... \le 1.252$

Published on 11 Nov 2018 - 14:07

score 42 · Answer 6 · 2026-04-10 22:03:02

42

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Function composition according to relation

Published on 10 Apr 2026 - 22:03

score 92 · Answer 7 · 2026-04-13 02:13:31

92

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exact closed form expression

Published on 13 Apr 2026 - 2:13

score 218 · Answer 8 · 2026-04-12 09:36:18

218

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Counting Distinguishable Dominoes

Published on 12 Apr 2026 - 9:36

score 1.5k · Answer 9 · 2026-03-27 07:13:59

1.5k

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Prove that congruence mod 7 is an equivalence relation.

Published on 27 Mar 2026 - 7:13

score 64 · Answer 10 · 2026-04-12 20:39:28

64

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How to build a matrix $M \in Mat_{1000 \times 1000}(\mathbb{R})$ to represent all possible combinations of a 6 digits code

Published on 12 Apr 2026 - 20:39

score 153 · Answer 11 · 2018-11-12 14:47:28

153

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The Knights Quest round table

Published on 12 Nov 2018 - 14:47

score 110 · Answer 12 · 2018-11-12 23:24:59

110

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Rearranging $nk$ distinct objects among $n$ boxes, $k$ objects per box. Probability no box is the same?

Published on 12 Nov 2018 - 23:24

score 215 · Answer 13 · 2018-11-13 03:18:14

215

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Decompose rational numbers into sum of rational numbers of the form $\frac{1}{a}$.

Published on 13 Nov 2018 - 3:18

score 48 · Answer 14 · 2018-11-13 04:49:17

48

Views

Discrete math ( graphs, trees and tours)

Published on 13 Nov 2018 - 4:49

score 87 · Answer 15 · 2026-03-25 04:37:46

87

Views

Combination Problem Part 1 about Catalan Number

Published on 25 Mar 2026 - 4:37

List Question

Constrained combinatorial question: 2 types of balls divided into k groups with limits

Probability of containing N distinct elements in a multiset?

Error in calculation of number of ways to put $20$ identical balls in $4$ labelled boxes if each box contains at most $18$ balls

Help constructing a counterexample subset of a non-abelian group

Show that $1.222 \le 1 + 3^{-2} + 5^{-2} + ... \le 1.252$

Function composition according to relation

exact closed form expression

Counting Distinguishable Dominoes

Prove that congruence mod 7 is an equivalence relation.

How to build a matrix $M \in Mat_{1000 \times 1000}(\mathbb{R})$ to represent all possible combinations of a 6 digits code

The Knights Quest round table

Rearranging $nk$ distinct objects among $n$ boxes, $k$ objects per box. Probability no box is the same?

Decompose rational numbers into sum of rational numbers of the form $\frac{1}{a}$.

Discrete math ( graphs, trees and tours)

Combination Problem Part 1 about Catalan Number

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