Question

Probability about extraction from two urns

score 167 · Answer 1 · 2018-05-01 09:31:41

167

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Probability about extraction from two urns

Published on 01 May 2018 - 9:31

score 370 · Answer 2 · 2018-05-01 10:06:29

370

Views

Probability: Number of marbles in bag if equal probability of drawing same and different color balls.

Published on 01 May 2018 - 10:06

score 421 · Answer 3 · 2018-05-01 10:54:05

421

Views

Number of password number-letter combinations given constraints

Published on 01 May 2018 - 10:54

score 326 · Answer 4 · 2018-05-01 11:19:04

326

Views

Dealing cards to 4 people with aces on top of the deck

Published on 01 May 2018 - 11:19

score 1.9k · Answer 5 · 2018-05-01 11:47:35

1.9k

Views

Probability of drawing 13-card hand from a deck of cards without any spades

Published on 01 May 2018 - 11:47

score 99 · Answer 6 · 2018-05-01 13:12:02

Looking for a combinatorial proof of $\sum_{k=0}^n \binom{n}{k} *2^k=\frac{3^n+(-1)^n}{2}$ where the sum over even numbers

score 87 · Answer 7 · 2026-04-09 03:15:20

87

Views

Properties of the closure in $\{0,1\}^\mathbb N$ of all shifts of a word

Published on 09 Apr 2026 - 3:15

score 89 · Answer 8 · 2026-03-26 14:42:35

89

Views

Want to Know if There's a Way to Solve This Problem Using Combinations?

Published on 26 Mar 2026 - 14:42

score 701 · Answer 9 · 2026-04-09 06:09:55

701

Views

How to arrange beads in a necklace so that rules are met | Formula

Published on 09 Apr 2026 - 6:09

score 26 · Answer 10 · 2026-03-26 04:31:34

26

Views

putting restrictions on the starting point for generating functions?

Published on 26 Mar 2026 - 4:31

score 43 · Answer 11 · 2026-03-26 14:27:43

43

Views

Count selections with the same numbers

Published on 26 Mar 2026 - 14:27

score 248 · Answer 12 · 2026-03-26 12:52:47

248

Views

Two different subsets of size four with the same sum

Published on 26 Mar 2026 - 12:52

score 1.5k · Answer 13 · 2018-05-01 15:30:33

1.5k

Views

How many numbers between 0 and 1,000 have the sum of their digits equal to 15 or less?

Published on 01 May 2018 - 15:30

score 1.7k · Answer 14 · 2026-03-26 13:01:18

1.7k

Views

How many even number greater than 300 can be formed from these numbers?

Published on 26 Mar 2026 - 13:01

score 76 · Answer 15 · 2026-03-25 10:55:44

76

Views

Is this inequality true? $ (nk)! \ge n^k \cdot k! $

Published on 25 Mar 2026 - 10:55

List Question

Probability about extraction from two urns

Probability: Number of marbles in bag if equal probability of drawing same and different color balls.

Number of password number-letter combinations given constraints

Dealing cards to 4 people with aces on top of the deck

Probability of drawing 13-card hand from a deck of cards without any spades

Looking for a combinatorial proof of $\sum_{k=0}^n \binom{n}{k} *2^k=\frac{3^n+(-1)^n}{2}$ where the sum over even numbers

Properties of the closure in $\{0,1\}^\mathbb N$ of all shifts of a word

Want to Know if There's a Way to Solve This Problem Using Combinations?

How to arrange beads in a necklace so that rules are met | Formula

putting restrictions on the starting point for generating functions?

Count selections with the same numbers

Two different subsets of size four with the same sum

How many numbers between 0 and 1,000 have the sum of their digits equal to 15 or less?

How many even number greater than 300 can be formed from these numbers?

Is this inequality true? $ (nk)! \ge n^k \cdot k! $

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