Question

Rectifying my mistake - Combinatorics

score 58 · Answer 1 · 2018-01-25 11:14:13

58

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Rectifying my mistake - Combinatorics

Published on 25 Jan 2018 - 11:14

score 707 · Answer 2 · 2026-03-25 01:18:11

707

Views

Number of non-negative integral solutions of $2x+3y+z=19$

Published on 25 Mar 2026 - 1:18

score 282 · Answer 3 · 2018-01-25 12:16:00

282

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How many possible ways are there to split 200 coins between three different baskets?

Published on 25 Jan 2018 - 12:16

score 723 · Answer 4 · 2026-03-25 05:04:01

723

Views

Expected number of 5-sticker packs needed to complete a Panini soccer album

Published on 25 Mar 2026 - 5:04

score 149 · Answer 5 · 2026-03-25 06:00:41

149

Views

An intriguing distance-like invariant

Published on 25 Mar 2026 - 6:00

score 269 · Answer 6 · 2026-03-25 06:21:19

269

Views

100 books in 10 identical bags

Published on 25 Mar 2026 - 6:21

score 721 · Answer 7 · 2026-03-31 14:59:52

721

Views

In how many ways can $5$ different colored balls be placed into $8$ bins if no bin contains more than one ball?

Published on 31 Mar 2026 - 14:59

score 171 · Answer 8 · 2026-03-26 02:45:52

171

Views

Prove that, $\binom{3n}{r}=\binom{3n-1}{r} + \binom{3n-1}{r-1}$

Published on 26 Mar 2026 - 2:45

score 28 · Answer 9 · 2026-03-25 06:07:11

28

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What is the expected difference in the gap of two polynomials in $Z_2[x_1, ..., x_n]$ when adding a randomly chosen variable $x_i, i \in [n]$?

Published on 25 Mar 2026 - 6:07

score 3.4k · Answer 10 · 2018-01-25 20:42:22

3.4k

Views

How many permutations of $\{1,2,3,4,5\}$ begin with an even number?

Published on 25 Jan 2018 - 20:42

score 844 · Answer 11 · 2018-01-25 21:14:00

844

Views

How many DNA sequences of length $3$ that have no C's at all or have no T's in the first position?

Published on 25 Jan 2018 - 21:14

score 410 · Answer 12 · 2018-01-25 22:04:17

How many numbers are there which have five digits, each having a number in $\{1,2,3,4,5,6,7,8,9\}$ and either having all odd or all even?

score 1.9k · Answer 13 · 2018-01-25 22:36:11

1.9k

Views

How many arrangements are there for the $8$ letters of the word VISITING?

Published on 25 Jan 2018 - 22:36

score 81 · Answer 14 · 2018-01-25 23:32:53

81

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If the committee is to have $2$ members from $2$ different backgrounds, how many committees are there?

Published on 25 Jan 2018 - 23:32

score 49 · Answer 15 · 2018-01-26 01:37:26

49

Views

What is the probability that, within a sequence of 20 shots, the player can score five baskets in a row?

Published on 26 Jan 2018 - 1:37

List Question

Rectifying my mistake - Combinatorics

Number of non-negative integral solutions of $2x+3y+z=19$

How many possible ways are there to split 200 coins between three different baskets?

Expected number of 5-sticker packs needed to complete a Panini soccer album

An intriguing distance-like invariant

100 books in 10 identical bags

In how many ways can $5$ different colored balls be placed into $8$ bins if no bin contains more than one ball?

Prove that, $\binom{3n}{r}=\binom{3n-1}{r} + \binom{3n-1}{r-1}$

What is the expected difference in the gap of two polynomials in $Z_2[x_1, ..., x_n]$ when adding a randomly chosen variable $x_i, i \in [n]$?

How many permutations of $\{1,2,3,4,5\}$ begin with an even number?

How many DNA sequences of length $3$ that have no C's at all or have no T's in the first position?

How many numbers are there which have five digits, each having a number in $\{1,2,3,4,5,6,7,8,9\}$ and either having all odd or all even?

How many arrangements are there for the $8$ letters of the word VISITING?

If the committee is to have $2$ members from $2$ different backgrounds, how many committees are there?

What is the probability that, within a sequence of 20 shots, the player can score five baskets in a row?

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