Question

Sequence arrangement and operation (combinatorics)

score 144 · Answer 1 · 2026-04-04 10:11:10

144

Views

Sequence arrangement and operation (combinatorics)

Published on 04 Apr 2026 - 10:11

score 117 · Answer 2 · 2018-04-14 06:45:00

117

Views

In how many ways can we pick $5$ people from $10$ married couples so that the $5$ chosen people are unrelated?

Published on 14 Apr 2018 - 6:45

score 332 · Answer 3 · 2018-04-14 09:21:00

332

Views

Number of ways to partition a set of $n$ indistinguishable items into $r$ groups

Published on 14 Apr 2018 - 9:21

score 361 · Answer 4 · 2026-04-01 02:48:41

361

Views

$2n+1$ Subsets whose cardinality is a multiples of 6

Published on 01 Apr 2026 - 2:48

score 1k · Answer 5 · 2026-04-05 03:57:31

1k

Views

Bijection for $q$-binomial coefficient

Published on 05 Apr 2026 - 3:57

score 1.6k · Answer 6 · 2026-03-25 23:39:29

1.6k

Views

Variance in the number of triangles in a random graph of size n

Published on 25 Mar 2026 - 23:39

score 91 · Answer 7 · 2018-04-14 13:15:46

91

Views

How do I distribute distinguishable items to distinguishable groups with given criteria?

Published on 14 Apr 2018 - 13:15

score 79 · Answer 8 · 2018-04-14 14:28:10

Someone guesses a number, using only $\gt, \lt$ or $=$ as responses to questions attempting to determine the number.

score 508 · Answer 9 · 2018-04-14 16:08:15

508

Views

How many ways to get an odd number of each color in each bin?

Published on 14 Apr 2018 - 16:08

score 558 · Answer 10 · 2018-04-14 16:28:30

558

Views

number of solutions to the equation $x_1+x_2+x_3=2018$ with odd\even condition on $x$.

Published on 14 Apr 2018 - 16:28

score 81 · Answer 11 · 2026-03-28 10:04:27

81

Views

12 students participate in 3 competitions twice in total. Count possible results.

Published on 28 Mar 2026 - 10:04

score 5.4k · Answer 12 · 2018-04-14 18:44:54

5.4k

Views

How many injective and surjective functions are there from $A$ to $B$?

Published on 14 Apr 2018 - 18:44

score 71 · Answer 13 · 2018-04-14 19:53:47

71

Views

How many tuples are there that satisfy the conditions listed below?

Published on 14 Apr 2018 - 19:53

score 297 · Answer 14 · 2018-04-14 20:57:34

297

Views

Number of solutions for an inequation $7 \le x_1 + x_2 + x_3 + x_4 \le 12$

Published on 14 Apr 2018 - 20:57

score 55 · Answer 15 · 2026-03-26 07:59:28

55

Views

How many ways to organize 12 volunteers with restrictions

Published on 26 Mar 2026 - 7:59

List Question

Sequence arrangement and operation (combinatorics)

In how many ways can we pick $5$ people from $10$ married couples so that the $5$ chosen people are unrelated?

Number of ways to partition a set of $n$ indistinguishable items into $r$ groups

$2n+1$ Subsets whose cardinality is a multiples of 6

Bijection for $q$-binomial coefficient

Variance in the number of triangles in a random graph of size n

How do I distribute distinguishable items to distinguishable groups with given criteria?

Someone guesses a number, using only $\gt, \lt$ or $=$ as responses to questions attempting to determine the number.

How many ways to get an odd number of each color in each bin?

number of solutions to the equation $x_1+x_2+x_3=2018$ with odd\even condition on $x$.

12 students participate in 3 competitions twice in total. Count possible results.

How many injective and surjective functions are there from $A$ to $B$?

How many tuples are there that satisfy the conditions listed below?

Number of solutions for an inequation $7 \le x_1 + x_2 + x_3 + x_4 \le 12$

How many ways to organize 12 volunteers with restrictions

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