Question

Issue deriving the probability distribution of the sample mean of a normally distributed variable

score 124 · Answer 1 · 2026-03-29 22:28:32

124

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Issue deriving the probability distribution of the sample mean of a normally distributed variable

Published on 29 Mar 2026 - 22:28

score 349 · Answer 2 · 2018-03-26 22:17:03

349

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How many ways can the set of 16 pieces be arranged in 16 squares on the chess board?

Published on 26 Mar 2018 - 22:17

score 70 · Answer 3 · 2026-03-25 04:40:31

70

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How to get the value of $x$ to solve the statement?

Published on 25 Mar 2026 - 4:40

score 519 · Answer 4 · 2018-03-27 01:18:49

519

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License plate combinations

Published on 27 Mar 2018 - 1:18

score 441 · Answer 5 · 2026-03-28 01:07:26

441

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Trying to understand solution: string of eight English letters that start and end with X that contain at least one vowel, if letters can be repeated?

Published on 28 Mar 2026 - 1:07

score 39 · Answer 6 · 2018-03-27 08:23:31

Given that at least $n$ elements from $A$ must be members in $C$, how many different sets C can be created by combining elements from $A$ and $B$?

score 2.6k · Answer 7 · 2026-04-04 06:20:54

2.6k

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How many partitions are there of a 5 element set into 3 parts (of a specific form)?

Published on 04 Apr 2026 - 6:20

score 75 · Answer 8 · 2018-03-27 10:15:36

75

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Probability that a random binary matrix has no pair of same columns?

Published on 27 Mar 2018 - 10:15

score 2.2k · Answer 9 · 2026-03-25 22:26:49

2.2k

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Is there a formula for sum of all nCr for a given n, such that r varies from 0 to n in steps of 4.

Published on 25 Mar 2026 - 22:26

score 128 · Answer 10 · 2026-03-25 12:41:34

128

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How many $k-$dimensional non-negative integer arrays $(x_1,\cdots,x_k)$ satisfies $x_1+x_2+\cdots+x_k\le n$

Published on 25 Mar 2026 - 12:41

score 92 · Answer 11 · 2018-03-27 16:16:25

92

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Using elementary combinatorics to solve dinner dates.

Published on 27 Mar 2018 - 16:16

score 7.1k · Answer 12 · 2026-03-26 06:20:21

7.1k

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Passwords: Two 50-characters vs one 100-characters

Published on 26 Mar 2026 - 6:20

score 39 · Answer 13 · 2026-03-25 01:17:42

39

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Can we count the number of polygons in conv((0,0),(d,0),(0,d))?

Published on 25 Mar 2026 - 1:17

score 242 · Answer 14 · 2026-03-28 01:07:37

242

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Trouble understanding concept: number of strings of 6 characters with exactly two vowels.

Published on 28 Mar 2026 - 1:07

score 87 · Answer 15 · 2026-03-26 04:53:13

87

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3 types of balls in an urn but only a few ways

Published on 26 Mar 2026 - 4:53

List Question

Issue deriving the probability distribution of the sample mean of a normally distributed variable

How many ways can the set of 16 pieces be arranged in 16 squares on the chess board?

How to get the value of $x$ to solve the statement?

License plate combinations

Trying to understand solution: string of eight English letters that start and end with X that contain at least one vowel, if letters can be repeated?

Given that at least $n$ elements from $A$ must be members in $C$, how many different sets C can be created by combining elements from $A$ and $B$?

How many partitions are there of a 5 element set into 3 parts (of a specific form)?

Probability that a random binary matrix has no pair of same columns?

Is there a formula for sum of all nCr for a given n, such that r varies from 0 to n in steps of 4.

How many $k-$dimensional non-negative integer arrays $(x_1,\cdots,x_k)$ satisfies $x_1+x_2+\cdots+x_k\le n$

Using elementary combinatorics to solve dinner dates.

Passwords: Two 50-characters vs one 100-characters

Can we count the number of polygons in conv((0,0),(d,0),(0,d))?

Trouble understanding concept: number of strings of 6 characters with exactly two vowels.

3 types of balls in an urn but only a few ways

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