Question

$n^2-n+2$ plane divisions by $n$ circles

score 1.1k · Answer 1 · 2018-09-26 21:28:10

1.1k

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$n^2-n+2$ plane divisions by $n$ circles

Published on 26 Sep 2018 - 21:28

score 663 · Answer 2 · 2018-09-27 05:50:37

663

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Compute the number of 7-digit sequences that contain a 5-digit consecutive substring

Published on 27 Sep 2018 - 5:50

score 408 · Answer 3 · 2018-09-27 06:22:16

408

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How many different ways can the letters in REVENUE be arranged to form different words?

Published on 27 Sep 2018 - 6:22

score 3.2k · Answer 4 · 2026-03-25 17:34:21

3.2k

Views

How many ways to pick up 1 or 3 chocolates from $n$ chocolates?

Published on 25 Mar 2026 - 17:34

score 126 · Answer 5 · 2026-03-25 13:55:40

126

Views

How many different ways to pay $2018, using only quarters, dimes, nickels, and pennies?

Published on 25 Mar 2026 - 13:55

score 2.7k · Answer 6 · 2026-03-19 18:26:07

2.7k

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How many palindromes are there in the range $0000$ to $9999$?

Published on 19 Mar 2026 - 18:26

score 47 · Answer 7 · 2026-03-27 18:49:42

47

Views

How to mathematically prove: $\sum_{x = r}^{n} C(x , r) = C(n+1 , r+1)$.

Published on 27 Mar 2026 - 18:49

score 1.4k · Answer 8 · 2018-09-29 04:05:34

1.4k

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Selecting $15$ pieces of fruit from a bowl containing apples, bananas, oranges, and pears with conditions

Published on 29 Sep 2018 - 4:05

score 130 · Answer 9 · 2026-03-27 18:49:42

130

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An application of this binomical identity $ \binom{n}{k}=\binom{n-1}{k}+\binom{n-1}{k-1} $

Published on 27 Mar 2026 - 18:49

score 3.6k · Answer 10 · 2018-09-29 20:52:34

3.6k

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Probability question help (Check my answers please) Q. selection ordered pairs nPr, nCr

Published on 29 Sep 2018 - 20:52

score 226 · Answer 11 · 2018-09-30 08:17:23

226

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Possible number of outcomes of $10$ indistinguishable dice

Published on 30 Sep 2018 - 8:17

score 56 · Answer 12 · 2018-09-30 12:38:12

56

Views

Combinations of divisors

Published on 30 Sep 2018 - 12:38

score 135 · Answer 13 · 2018-09-30 18:24:19

135

Views

What is the chance that there are not 4 or more consecutive white balls?

Published on 30 Sep 2018 - 18:24

score 196 · Answer 14 · 2018-09-30 19:32:29

196

Views

In how many ways can I select 4 groups from 10 indistinguishable items where each selected group only contains either 0 or an odd number of items

Published on 30 Sep 2018 - 19:32

score 419 · Answer 15 · 2018-09-30 22:25:53

419

Views

how many ways are there to divide 180 items into 36 groups of 5?

Published on 30 Sep 2018 - 22:25

List Question

$n^2-n+2$ plane divisions by $n$ circles

Compute the number of 7-digit sequences that contain a 5-digit consecutive substring

How many different ways can the letters in REVENUE be arranged to form different words?

How many ways to pick up 1 or 3 chocolates from $n$ chocolates?

How many different ways to pay $2018, using only quarters, dimes, nickels, and pennies?

How many palindromes are there in the range $0000$ to $9999$?

How to mathematically prove: $\sum_{x = r}^{n} C(x , r) = C(n+1 , r+1)$.

Selecting $15$ pieces of fruit from a bowl containing apples, bananas, oranges, and pears with conditions

An application of this binomical identity $ \binom{n}{k}=\binom{n-1}{k}+\binom{n-1}{k-1} $

Probability question help (Check my answers please) Q. selection ordered pairs nPr, nCr

Possible number of outcomes of $10$ indistinguishable dice

Combinations of divisors

What is the chance that there are not 4 or more consecutive white balls?

In how many ways can I select 4 groups from 10 indistinguishable items where each selected group only contains either 0 or an odd number of items

how many ways are there to divide 180 items into 36 groups of 5?

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