List questions from inclusion-exclusion

Published on 28 Mar 2026 - 1:26

71

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Number of Integers using Inclusion-Exclusion

Published on 30 Mar 2026 - 21:16

313

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12 distinct objects are distributed into 10 distinct box such that each box is non-empty. Find probability that no box contain 3 elements

Published on 28 Mar 2026 - 6:01

2.2k

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Circuits probability problem

Published on 06 Aug 2021 - 13:23

1.1k

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Discrete mathematics - ternary strings.

Published on 28 Mar 2026 - 1:26

90

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Covering count of a set of $n$ elements

Published on 10 Aug 2021 - 0:58

68

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Closed form expression‎ of double-way matching problem (Special case of derangement)

Published on 24 Feb 2026 - 0:14

97

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Or/Not Conditions in Number Theory

Published on 11 Aug 2021 - 22:30

46

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Express number of partitions into prime numbers using partitions into natural numbers.

Published on 01 Apr 2026 - 18:10

803

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Combinations with restrictions and limitations

Published on 16 Aug 2021 - 11:39

963

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Calculating number of times exactly 2 pairs of consecutive identical letters.

Published on 20 Aug 2021 - 17:21

397

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A general "inclusion-exclusion principle" / Formulas like $\inf(a,b)\sup(a,b)=ab$

Published on 25 Aug 2021 - 2:46

95

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$\mathbb{P}(B_1) = S_1-2S_2+3S_3-4S_4+...+(-1)^{n-1}n S_n$

Published on 08 Sep 2021 - 15:42

251

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What is the maximum percentage of people who have studied neither $A$ nor $B$?

Published on 09 Sep 2021 - 16:32

63

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Probability She likes Music

Published on 09 Sep 2021 - 20:25

List Question

Counting the number of passwords with at least one digit, one consonant and one vowel

Number of Integers using Inclusion-Exclusion

12 distinct objects are distributed into 10 distinct box such that each box is non-empty. Find probability that no box contain 3 elements

Circuits probability problem

Discrete mathematics - ternary strings.

Covering count of a set of $n$ elements

Closed form expression‎ of double-way matching problem (Special case of derangement)

Or/Not Conditions in Number Theory

Express number of partitions into prime numbers using partitions into natural numbers.

Combinations with restrictions and limitations

Calculating number of times exactly 2 pairs of consecutive identical letters.

A general "inclusion-exclusion principle" / Formulas like $\inf(a,b)\sup(a,b)=ab$

$\mathbb{P}(B_1) = S_1-2S_2+3S_3-4S_4+...+(-1)^{n-1}n S_n$

What is the maximum percentage of people who have studied neither $A$ nor $B$?

Probability She likes Music

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