Question

Given the set of all strings of length 5 over the alphabet {a, b, c, d, e, f, g, h}, how many strings begin or end with an "e"?

score 366 · Answer 1 · 2023-03-18 01:37:02

366

Views

Given the set of all strings of length 5 over the alphabet {a, b, c, d, e, f, g, h}, how many strings begin or end with an "e"?

Published on 18 Mar 2023 - 1:37

score 105 · Answer 2 · 2023-03-23 18:12:26

105

Views

How many strings can be formed by reordering the letters ABCDEF so that each string contains the substring EA or the substring CE or both?

Published on 23 Mar 2023 - 18:12

score 233 · Answer 3 · 2023-04-01 18:01:33

233

Views

Find number of legal codes containing even number of zeros

Published on 01 Apr 2023 - 18:01

score 123 · Answer 4 · 2023-04-04 22:20:17

123

Views

Given $m$ objects of type A and $n$ objects of type B, arrange them such that there are not more than two consecutive objects of type B.

Published on 04 Apr 2023 - 22:20

score 396 · Answer 5 · 2023-04-08 11:36:06

396

Views

Combinatorics 1 by n tiling problem generating function

Published on 08 Apr 2023 - 11:36

score 52 · Answer 6 · 2026-02-23 12:17:40

52

Views

number of n length binary strings not containing specific factor [SOLVED].

Published on 23 Feb 2026 - 12:17

score 190 · Answer 7 · 2026-03-25 13:53:38

190

Views

Inequality regarding kostka numbers in representation theory

Published on 25 Mar 2026 - 13:53

score 61 · Answer 8 · 2023-06-15 21:14:04

61

Views

Recovering an element of a free group from its projections

Published on 15 Jun 2023 - 21:14

score 126 · Answer 9 · 2026-03-26 09:26:56

126

Views

Number of Distinct Words of arbitrary length $k$ in Euclidean N-Space (i.e; $\mathbb{Z}^N$)

Published on 26 Mar 2026 - 9:26

score 108 · Answer 10 · 2023-06-29 04:59:47

108

Views

"No two $0$'s together" versus "No two consecutive $0$'s"

Published on 29 Jun 2023 - 4:59

score 222 · Answer 11 · 2023-06-30 18:21:46

222

Views

Understanding Smirnov words in analytic combinatorics

Published on 30 Jun 2023 - 18:21

score 69 · Answer 12 · 2023-07-02 12:31:59

69

Views

Number of strings of length $n$ over {$x,y,z$} where $x$ and $y$ appear at least once

Published on 02 Jul 2023 - 12:31

score 93 · Answer 13 · 2026-03-26 06:20:36

93

Views

Defining permutations of multiset using bijections

Published on 26 Mar 2026 - 6:20

score 58 · Answer 14 · 2026-03-26 12:33:41

58

Views

Formula for the Wythoff array from the infinite Fibonacci word

Published on 26 Mar 2026 - 12:33

score 75 · Answer 15 · 2023-07-31 18:23:04

75

Views

There are $n! $ word made from a world of n different letter by reversing the "maximum" number between the initial letters

Published on 31 Jul 2023 - 18:23

List Question

Given the set of all strings of length 5 over the alphabet {a, b, c, d, e, f, g, h}, how many strings begin or end with an "e"?

How many strings can be formed by reordering the letters ABCDEF so that each string contains the substring EA or the substring CE or both?

Find number of legal codes containing even number of zeros

Given $m$ objects of type A and $n$ objects of type B, arrange them such that there are not more than two consecutive objects of type B.

Combinatorics 1 by n tiling problem generating function

number of n length binary strings not containing specific factor [SOLVED].

Inequality regarding kostka numbers in representation theory

Recovering an element of a free group from its projections

Number of Distinct Words of arbitrary length $k$ in Euclidean N-Space (i.e; $\mathbb{Z}^N$)

"No two $0$'s together" versus "No two consecutive $0$'s"

Understanding Smirnov words in analytic combinatorics

Number of strings of length $n$ over {$x,y,z$} where $x$ and $y$ appear at least once

Defining permutations of multiset using bijections

Formula for the Wythoff array from the infinite Fibonacci word

There are $n! $ word made from a world of n different letter by reversing the "maximum" number between the initial letters

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