Question

How many $7$-digit telephone numbers with distinct digits starting with $927$ are there?

score 2.2k · Answer 1 · 2026-03-27 06:56:41

2.2k

Views

How many $7$-digit telephone numbers with distinct digits starting with $927$ are there?

Published on 27 Mar 2026 - 6:56

score 416 · Answer 2 · 2026-03-27 06:56:53

416

Views

permutation: seven boys and 4 girls

Published on 27 Mar 2026 - 6:56

score 118 · Answer 3 · 2026-03-25 17:44:04

118

Views

Probability that people are chosen in different groups?

Published on 25 Mar 2026 - 17:44

score 122 · Answer 4 · 2018-02-20 15:28:53

122

Views

Combinatorics - 6 girls arranged in 2 rows ( each row contains at least 1 girl)

Published on 20 Feb 2018 - 15:28

score 49 · Answer 5 · 2018-02-20 15:54:31

49

Views

2-player urn problem

Published on 20 Feb 2018 - 15:54

score 4.3k · Answer 6 · 2026-03-27 06:51:57

4.3k

Views

In how many ways may $5$ people sit in a row of five chairs if two of them refuse to sit next to each other?

Published on 27 Mar 2026 - 6:51

score 1k · Answer 7 · 2018-02-20 16:40:17

Number of solution set such that $a \geq b \geq c \geq d \geq 0$; $a, b, c, d \in \mathbb{Z}$ and $a + b + c + d = 10$

score 580 · Answer 8 · 2026-03-27 06:51:56

580

Views

Number of permutations of letters of the word PENDULAM such that vowels are never togehter

Published on 27 Mar 2026 - 6:51

score 330 · Answer 9 · 2018-02-20 16:51:12

330

Views

Find the coefficient of $x^{25}$ in $(1 + x^3 + x^8)^{10}$

Published on 20 Feb 2018 - 16:51

score 16 · Answer 10 · 2018-02-20 17:04:31

16

Views

permutation problem-four main highways

Published on 20 Feb 2018 - 17:04

score 494 · Answer 11 · 2018-02-20 17:27:53

494

Views

From $1$ to $50$, take a pair of integers so that their sum is greater than $50$

Published on 20 Feb 2018 - 17:27

score 183 · Answer 12 · 2018-02-20 18:00:59

183

Views

Give a combinatorial proof (n, k)

Published on 20 Feb 2018 - 18:00

score 904 · Answer 13 · 2026-03-25 07:52:34

904

Views

Use a generating function to find the number of ways to distribute $r$ jelly beans among $8$ children if each child gets at least one jelly bean.

Published on 25 Mar 2026 - 7:52

score 289 · Answer 14 · 2026-03-25 03:00:35

289

Views

Difference Calculus of the Factorial Function for Negative Integer Powers of $x$

Published on 25 Mar 2026 - 3:00

score 1.4k · Answer 15 · 2018-02-20 19:19:14

ways are there to distribute $7$ (identical) apples, $6$ oranges and $7$ pears among $3$ different people with each person getting at least $1$ pear?

List Question

How many $7$-digit telephone numbers with distinct digits starting with $927$ are there?

permutation: seven boys and 4 girls

Probability that people are chosen in different groups?

Combinatorics - 6 girls arranged in 2 rows ( each row contains at least 1 girl)

2-player urn problem

In how many ways may $5$ people sit in a row of five chairs if two of them refuse to sit next to each other?

Number of solution set such that $a \geq b \geq c \geq d \geq 0$; $a, b, c, d \in \mathbb{Z}$ and $a + b + c + d = 10$

Number of permutations of letters of the word PENDULAM such that vowels are never togehter

Find the coefficient of $x^{25}$ in $(1 + x^3 + x^8)^{10}$

permutation problem-four main highways

From $1$ to $50$, take a pair of integers so that their sum is greater than $50$

Give a combinatorial proof (n, k)

Use a generating function to find the number of ways to distribute $r$ jelly beans among $8$ children if each child gets at least one jelly bean.

Difference Calculus of the Factorial Function for Negative Integer Powers of $x$

ways are there to distribute $7$ (identical) apples, $6$ oranges and $7$ pears among $3$ different people with each person getting at least $1$ pear?

Trending Questions

Popular # Hahtags

Popular Questions