Question

Number of solutions to the equation $x_1+x_2+x_3+x_4=19$ with $0\leq x_i\leq 8$

score 610 · Answer 1 · 2019-08-16 21:59:27

610

Views

Number of solutions to the equation $x_1+x_2+x_3+x_4=19$ with $0\leq x_i\leq 8$

Published on 16 Aug 2019 - 21:59

score 115 · Answer 2 · 2019-08-20 14:26:23

115

Views

What is the number of possibilities to choose $~80~$ numbers out of the set $~\{10,11,\cdots,99\}~$ with repetition and no order significant

Published on 20 Aug 2019 - 14:26

score 267 · Answer 3 · 2019-08-24 16:35:15

267

Views

Why are there $2^n-1$ terms in the inclusion-exclusion formula of $n$ sets?

Published on 24 Aug 2019 - 16:35

score 329 · Answer 4 · 2019-09-01 08:20:46

329

Views

How many numbers between $1$ and $999,999$ inclusive have exactly two of the digits $1, 2, 3$ and $4$ at least once?

Published on 01 Sep 2019 - 8:20

score 90 · Answer 5 · 2026-03-26 07:58:52

90

Views

Arranging the $26$ English letters in a row given two constraints

Published on 26 Mar 2026 - 7:58

score 28 · Answer 6 · 2019-09-08 14:52:46

28

Views

Find number of matrices $B$ with no common row and no common column with a given matrix $A$

Published on 08 Sep 2019 - 14:52

score 108 · Answer 7 · 2019-09-10 09:05:37

108

Views

Inclusion–exclusion principle problem

Published on 10 Sep 2019 - 9:05

score 13.4k · Answer 8 · 2019-09-16 04:51:51

13.4k

Views

Number of bit strings of length four do not have two consecutive 1s

Published on 16 Sep 2019 - 4:51

score 78 · Answer 9 · 2019-09-17 11:59:35

78

Views

Inclusion exclusion involving distribution.

Published on 17 Sep 2019 - 11:59

score 100 · Answer 10 · 2019-09-24 15:46:41

100

Views

If $n$ numbers are generated, what is the probability that the product of all those numbers is a multiple of 10?

Published on 24 Sep 2019 - 15:46

score 893 · Answer 11 · 2019-09-25 15:55:12

893

Views

Draw $13$ cards out of $52$ with one suit missing

Published on 25 Sep 2019 - 15:55

score 759 · Answer 12 · 2026-02-23 06:39:38

759

Views

Find the thousandth number in the sequence of numbers relatively prime to $105$.

Published on 23 Feb 2026 - 6:39

score 380 · Answer 13 · 2019-10-01 22:39:43

380

Views

Ways to Arrange 7 things given restrictions

Published on 01 Oct 2019 - 22:39

score 287 · Answer 14 · 2014-03-13 00:36:30

287

Views

Finding the number of onto maps from $A = \{1,2,3,4,5\}$ to $B = \{a,b,c\}$

Published on 13 Mar 2014 - 0:36

score 468 · Answer 15 · 2014-03-13 03:31:39

468

Views

Determining number of solutions with inclusion-exclusion

Published on 13 Mar 2014 - 3:31

List Question

Number of solutions to the equation $x_1+x_2+x_3+x_4=19$ with $0\leq x_i\leq 8$

What is the number of possibilities to choose $~80~$ numbers out of the set $~\{10,11,\cdots,99\}~$ with repetition and no order significant

Why are there $2^n-1$ terms in the inclusion-exclusion formula of $n$ sets?

How many numbers between $1$ and $999,999$ inclusive have exactly two of the digits $1, 2, 3$ and $4$ at least once?

Arranging the $26$ English letters in a row given two constraints

Find number of matrices $B$ with no common row and no common column with a given matrix $A$

Inclusion–exclusion principle problem

Number of bit strings of length four do not have two consecutive 1s

Inclusion exclusion involving distribution.

If $n$ numbers are generated, what is the probability that the product of all those numbers is a multiple of 10?

Draw $13$ cards out of $52$ with one suit missing

Find the thousandth number in the sequence of numbers relatively prime to $105$.

Ways to Arrange 7 things given restrictions

Finding the number of onto maps from $A = \{1,2,3,4,5\}$ to $B = \{a,b,c\}$

Determining number of solutions with inclusion-exclusion

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