Question

Generating Functions and stars and bars

score 212 · Answer 1 · 2018-10-08 23:28:09

212

Views

Generating Functions and stars and bars

Published on 08 Oct 2018 - 23:28

score 105 · Answer 2 · 2026-04-02 23:41:25

105

Views

How many passwords of exactly 8 upper case letters contain the letters X and Y with X appearing before Y, with all letters distinct?

Published on 02 Apr 2026 - 23:41

score 630 · Answer 3 · 2026-03-26 06:22:17

630

Views

What are some examples of ∃x (P(x) <-> Q(x)) and (∃xP(x)) <-> (∃xQ(x)) not being logically equivalent to each other

Published on 26 Mar 2026 - 6:22

score 771 · Answer 4 · 2026-04-02 23:41:03

771

Views

How many strings of length 9 can be formed using the letters HELLOJELLO?

Published on 02 Apr 2026 - 23:41

score 727 · Answer 5 · 2026-04-02 23:40:36

727

Views

Number of DNA sequences of length $10$ that contain TAGA as a substring

Published on 02 Apr 2026 - 23:40

score 39 · Answer 6 · 2026-04-11 10:53:04

39

Views

Finding Number Of Derangement

Published on 11 Apr 2026 - 10:53

score 155 · Answer 7 · 2026-04-07 20:10:56

155

Views

How to find the combined expected value

Published on 07 Apr 2026 - 20:10

score 264 · Answer 8 · 2026-04-02 23:41:24

264

Views

The house numbers on a street each have 4 digits that range from 1000 to 9999. How many of these house numbers have exactly 2 digits that are 5?

Published on 02 Apr 2026 - 23:41

score 1.5k · Answer 9 · 2026-04-11 11:45:18

1.5k

Views

Proof that Cardinality of Primes is Cardinality of Natural Numbers

Published on 11 Apr 2026 - 11:45

score 46 · Answer 10 · 2026-04-02 09:14:14

46

Views

How to prove $(A \cap B) \cap C \subseteq A \cap (B \cap C)$

Published on 02 Apr 2026 - 9:14

score 183 · Answer 11 · 2026-04-02 23:45:38

183

Views

How many binary strings of length $10$ contain at least $4$ $0$'s?

Published on 02 Apr 2026 - 23:45

score 83 · Answer 12 · 2026-04-09 15:05:57

83

Views

closed form formula question

Published on 09 Apr 2026 - 15:05

score 83 · Answer 13 · 2026-03-29 06:54:57

83

Views

$a_{n+1}=a_{n}^{2}-2 $

Published on 29 Mar 2026 - 6:54

score 73 · Answer 14 · 2026-03-25 11:03:29

73

Views

Simplifying Summation of the Form $\sum_{n=-\infty}^{\infty}\sum_{m=-\infty}^{\infty}f(n+\alpha m)g(n-\alpha m)$

Published on 25 Mar 2026 - 11:03

score 113 · Answer 15 · 2026-03-26 01:02:58

113

Views

An example satisfying $P(X > Y) > \frac 12$, but $E_X < E_Y$

Published on 26 Mar 2026 - 1:02

List Question

Generating Functions and stars and bars

How many passwords of exactly 8 upper case letters contain the letters X and Y with X appearing before Y, with all letters distinct?

What are some examples of ∃x (P(x) <-> Q(x)) and (∃xP(x)) <-> (∃xQ(x)) not being logically equivalent to each other

How many strings of length 9 can be formed using the letters HELLOJELLO?

Number of DNA sequences of length $10$ that contain TAGA as a substring

Finding Number Of Derangement

How to find the combined expected value

The house numbers on a street each have 4 digits that range from 1000 to 9999. How many of these house numbers have exactly 2 digits that are 5?

Proof that Cardinality of Primes is Cardinality of Natural Numbers

How to prove $(A \cap B) \cap C \subseteq A \cap (B \cap C)$

How many binary strings of length $10$ contain at least $4$ $0$'s?

closed form formula question

$a_{n+1}=a_{n}^{2}-2 $

Simplifying Summation of the Form $\sum_{n=-\infty}^{\infty}\sum_{m=-\infty}^{\infty}f(n+\alpha m)g(n-\alpha m)$

An example satisfying $P(X > Y) > \frac 12$, but $E_X < E_Y$

Trending Questions

Popular # Hahtags

Popular Questions