Question

Formulating an alternating sum of product combinations

score 88 · Answer 1 · 2022-02-14 04:48:34

88

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Formulating an alternating sum of product combinations

Published on 14 Feb 2022 - 4:48

score 1.6k · Answer 2 · 2026-03-28 10:56:20

1.6k

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In how many ways we can place 9 different balls in 3 different boxes such that in every box at least 2 balls are placed?

Published on 28 Mar 2026 - 10:56

score 215 · Answer 3 · 2022-02-17 09:29:15

215

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Weighted Version of Inclusion-Exclusion Principle.

Published on 17 Feb 2022 - 9:29

score 6.9k · Answer 4 · 2022-02-21 09:04:28

6.9k

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Calculating a 3 Circle Venn Diagram only knowing A, B, and C?

Published on 21 Feb 2022 - 9:04

score 339 · Answer 5 · 2022-02-21 13:11:07

339

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If 4 cards are picked from the 36 number cards in a deck, how many ways can you choose the cards so that no two are consecutive numbers?

Published on 21 Feb 2022 - 13:11

score 698 · Answer 6 · 2022-02-26 13:05:59

698

Views

How many strings of five decimal digits must be starting or ending with an odd number?

Published on 26 Feb 2022 - 13:05

score 132 · Answer 7 · 2022-03-01 05:35:44

132

Views

How many ordered pairs $(A,B)$ there are if $A$ and $B$ are subsets of $\{ 1,2,3,4,5,\ldots,20 \}$ such that $A \cap B = \{2,5,6\}$?

Published on 01 Mar 2022 - 5:35

score 52 · Answer 8 · 2022-03-01 20:52:24

52

Views

Stars and Bars vs. PIE for probability question.

Published on 01 Mar 2022 - 20:52

score 790 · Answer 9 · 2022-03-02 12:40:08

790

Views

What is the probability of choosing a 4-digit number that starts with 1 or 2, and has at least 3 of the same digit?

Published on 02 Mar 2022 - 12:40

score 256 · Answer 10 · 2022-03-11 06:46:21

256

Views

prove if $E_{1},E_{2},...,E_{n}$ are independent events then $p(\cup_{i=1}^{n}E_{i})=1-\prod_{i=1}^{n}[1-p(E_{i})]$

Published on 11 Mar 2022 - 6:46

score 1.1k · Answer 11 · 2022-03-11 17:58:05

1.1k

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how to find the number of integers between two numbers inclusive that are divisible by any of the two numbers X or Y.

Published on 11 Mar 2022 - 17:58

score 106 · Answer 12 · 2022-03-17 15:18:21

106

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Question about Inclusion-Exclusion Principle

Published on 17 Mar 2022 - 15:18

score 28 · Answer 13 · 2022-03-30 09:24:14

28

Views

Is $X_{0}$ a subset of $X_{0}\sqcup X_{1}$?

Published on 30 Mar 2022 - 9:24

score 164 · Answer 14 · 2022-03-30 21:58:28

164

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How many solutions does $x_1+x_2+x_3 = 11$ have if $0\le x_1 \le 3$, $0\le x_2 \le 4$, and $0\le x_3 \le 6$?

Published on 30 Mar 2022 - 21:58

score 156 · Answer 15 · 2026-03-31 14:23:25

156

Views

Combinatorial interpretation of a sum

Published on 31 Mar 2026 - 14:23

List Question

Formulating an alternating sum of product combinations

In how many ways we can place 9 different balls in 3 different boxes such that in every box at least 2 balls are placed?

Weighted Version of Inclusion-Exclusion Principle.

Calculating a 3 Circle Venn Diagram only knowing A, B, and C?

If 4 cards are picked from the 36 number cards in a deck, how many ways can you choose the cards so that no two are consecutive numbers?

How many strings of five decimal digits must be starting or ending with an odd number?

How many ordered pairs $(A,B)$ there are if $A$ and $B$ are subsets of $\{ 1,2,3,4,5,\ldots,20 \}$ such that $A \cap B = \{2,5,6\}$?

Stars and Bars vs. PIE for probability question.

What is the probability of choosing a 4-digit number that starts with 1 or 2, and has at least 3 of the same digit?

prove if $E_{1},E_{2},...,E_{n}$ are independent events then $p(\cup_{i=1}^{n}E_{i})=1-\prod_{i=1}^{n}[1-p(E_{i})]$

how to find the number of integers between two numbers inclusive that are divisible by any of the two numbers X or Y.

Question about Inclusion-Exclusion Principle

Is $X_{0}$ a subset of $X_{0}\sqcup X_{1}$?

How many solutions does $x_1+x_2+x_3 = 11$ have if $0\le x_1 \le 3$, $0\le x_2 \le 4$, and $0\le x_3 \le 6$?

Combinatorial interpretation of a sum

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