Question

Number of functions from $A=\left\{1,2,3,4,5\right\}$ to $B=\left\{0,1,2,3,4,5\right\}$ such that $f(i) \ne i$

score 240 · Answer 1 · 2018-06-01 13:49:54

240

Views

Number of functions from $A=\left\{1,2,3,4,5\right\}$ to $B=\left\{0,1,2,3,4,5\right\}$ such that $f(i) \ne i$

Published on 01 Jun 2018 - 13:49

score 71 · Answer 2 · 2026-03-30 15:30:56

71

Views

Lower bound on number of vertices of some specific graph

Published on 30 Mar 2026 - 15:30

score 375 · Answer 3 · 2026-04-11 09:48:39

375

Views

Maximum run of heads in n coin tosses

Published on 11 Apr 2026 - 9:48

score 44 · Answer 4 · 2026-04-13 12:43:49

44

Views

2-pairings in a set A, where |A|=8

Published on 13 Apr 2026 - 12:43

score 243 · Answer 5 · 2026-04-06 05:56:03

243

Views

Dimension of homology of $q$-skeleton

Published on 06 Apr 2026 - 5:56

score 432 · Answer 6 · 2026-03-25 09:28:46

432

Views

Probability of any k positions matching across a set of n random binary strings of length L?

Published on 25 Mar 2026 - 9:28

score 39 · Answer 7 · 2026-04-09 07:10:15

39

Views

Term for Patterns Within A Permutation

Published on 09 Apr 2026 - 7:10

score 177 · Answer 8 · 2026-04-09 23:08:52

177

Views

Elementary Permutations without repetition

Published on 09 Apr 2026 - 23:08

score 389 · Answer 9 · 2026-03-25 13:55:38

389

Views

Tilde notation of $\sum_{i=0}^n \frac{n!}{(n-i)!}$

Published on 25 Mar 2026 - 13:55

score 5.7k · Answer 10 · 2026-04-13 06:59:40

5.7k

Views

How many ways can a row of lights be turned on and off

Published on 13 Apr 2026 - 6:59

score 258 · Answer 11 · 2026-03-26 22:13:21

258

Views

distributing $n$ identical objects to $r$ groups with each group receiving a different number of objects

Published on 26 Mar 2026 - 22:13

score 116 · Answer 12 · 2026-04-13 21:11:30

116

Views

On the conditional expectation

Published on 13 Apr 2026 - 21:11

score 1.4k · Answer 13 · 2026-04-11 02:26:26

1.4k

Views

What is the formula for Combination with indistinguishable objects?

Published on 11 Apr 2026 - 2:26

score 276 · Answer 14 · 2026-03-29 14:59:22

276

Views

The number of words formed by permuting the letters L,O,C,K,U,P such that neither 'LOCK' nor 'UP' appears in any such arrangement

Published on 29 Mar 2026 - 14:59

score 60 · Answer 15 · 2026-04-12 14:47:50

60

Views

How can I solve the problems of Combination + indistinguishable objects + repetition allowed?

Published on 12 Apr 2026 - 14:47

List Question

Number of functions from $A=\left\{1,2,3,4,5\right\}$ to $B=\left\{0,1,2,3,4,5\right\}$ such that $f(i) \ne i$

Lower bound on number of vertices of some specific graph

Maximum run of heads in n coin tosses

2-pairings in a set A, where |A|=8

Dimension of homology of $q$-skeleton

Probability of any k positions matching across a set of n random binary strings of length L?

Term for Patterns Within A Permutation

Elementary Permutations without repetition

Tilde notation of $\sum_{i=0}^n \frac{n!}{(n-i)!}$

How many ways can a row of lights be turned on and off

distributing $n$ identical objects to $r$ groups with each group receiving a different number of objects

On the conditional expectation

What is the formula for Combination with indistinguishable objects?

The number of words formed by permuting the letters L,O,C,K,U,P such that neither 'LOCK' nor 'UP' appears in any such arrangement

How can I solve the problems of Combination + indistinguishable objects + repetition allowed?

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