Question

How do I find the number of solutions of the equation $r_1 + r_2 + .... + r_k = n$

score 134 · Answer 1 · 2026-03-26 02:47:38

134

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How do I find the number of solutions of the equation $r_1 + r_2 + .... + r_k = n$

Published on 26 Mar 2026 - 2:47

score 165 · Answer 2 · 2026-05-07 00:27:29

165

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Sum of the first k multi-nomial coefficients for fixed n

Published on 07 May 2026 - 0:27

score 798 · Answer 3 · 2026-04-16 04:43:17

798

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Let $f(x),g(x),h(x)$ are three differentiable functions satisfying:

Published on 16 Apr 2026 - 4:43

score 352 · Answer 4 · 2026-04-16 07:13:22

352

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score 98 · Answer 5 · 2026-04-12 20:37:56

98

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score 47 · Answer 6 · 2026-04-28 17:16:52

47

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score 895 · Answer 7 · 2026-04-12 00:25:22

895

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How to expand $(a_0+a_1x+a_2x^2+...a_nx^n)^2$?

Published on 12 Apr 2026 - 0:25

score 102 · Answer 8 · 2026-03-26 02:47:36

102

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Find the number of distinct arrangements of 5 unequal positive integers such that their sum is 20

Published on 26 Mar 2026 - 2:47

score 913 · Answer 9 · 2026-03-26 02:44:36

913

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score 12.8k · Answer 10 · 2026-03-26 02:47:37

12.8k

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The number of seven digit integers, with sum of the digits equal to 10 and formed by using the digits 1, 2 and 3 only, is

Published on 26 Mar 2026 - 2:47

score 3.7k · Answer 11 · 2026-04-10 14:25:41

3.7k

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score 24 · Answer 12 · 2026-04-12 01:22:17

24

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score 67 · Answer 13 · 2026-04-11 15:33:06

67

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Published on 11 Apr 2026 - 15:33

score 152 · Answer 14 · 2026-04-11 05:44:48

152

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multinomial distribution for unequal groups?

Published on 11 Apr 2026 - 5:44

score 601 · Answer 15 · 2026-04-13 20:37:56

601

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How many ways can we group 8 balls into groups of size 3?

Published on 13 Apr 2026 - 20:37

List Question

How do I find the number of solutions of the equation $r_1 + r_2 + .... + r_k = n$

Sum of the first k multi-nomial coefficients for fixed n

Let $f(x),g(x),h(x)$ are three differentiable functions satisfying:

Notation for writing multinomial coefficient as sum of smaller multinomial coefficients

Letter combinatorics and probabilities

Dice role: What is the probability to observe 2 times 1 and 2 times 5 with the outcome of a fifth die role being unknown?

How to expand $(a_0+a_1x+a_2x^2+...a_nx^n)^2$?

Find the number of distinct arrangements of 5 unequal positive integers such that their sum is 20

Multinomial theorem for rational exponent in application to a trinomial

The number of seven digit integers, with sum of the digits equal to 10 and formed by using the digits 1, 2 and 3 only, is

Fisher information matrix for multinomial distribution

Multipole expansion of point at $z=-d$ vs point at $z=d$

An estimate of euclidean norm via multinomial theorem

multinomial distribution for unequal groups?

How many ways can we group 8 balls into groups of size 3?

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