Question

In how many ways can we place $3$ red and $4$ blue balls into $3$ indistinguishable boxes so that no box is empty?

score 277 · Answer 1 · 2026-03-31 07:57:42

277

Views

In how many ways can we place $3$ red and $4$ blue balls into $3$ indistinguishable boxes so that no box is empty?

Published on 31 Mar 2026 - 7:57

score 715 · Answer 2 · 2019-04-11 14:06:56

715

Views

Average distance moved by a permutation

Published on 11 Apr 2019 - 14:06

score 59 · Answer 3 · 2019-04-11 15:47:42

59

Views

Estimate number of permutations with unknown number of variables

Published on 11 Apr 2019 - 15:47

score 257 · Answer 4 · 2019-04-11 16:14:57

257

Views

The no. of possible $3$ digit number $abc$ if $a,b,c$ are the sides of a isosceles triangle.

Published on 11 Apr 2019 - 16:14

score 40 · Answer 5 · 2026-03-26 16:56:52

40

Views

How limitations affect the number of possible pandigital numbers

Published on 26 Mar 2026 - 16:56

score 2.3k · Answer 6 · 2026-03-31 03:34:40

2.3k

Views

arranging 2 blue balls, 2 red balls and 1 green ball

Published on 31 Mar 2026 - 3:34

score 68 · Answer 7 · 2026-03-31 05:42:45

68

Views

Using Draw Blanks approach to solve a probability question of drawing 2 red, 2 blue and 1 green marbles.

Published on 31 Mar 2026 - 5:42

score 5.2k · Answer 8 · 2026-03-31 10:14:45

5.2k

Views

If a fair coin is flipped 5 times, what is the probability of getting exactly 3 heads

Published on 31 Mar 2026 - 10:14

score 120 · Answer 9 · 2026-03-26 17:50:21

120

Views

Is there a good way to show that the order of element in $S_7$ are at most $12$?

Published on 26 Mar 2026 - 17:50

score 46 · Answer 10 · 2026-03-31 05:41:19

46

Views

A question about contestants linked with combinations

Published on 31 Mar 2026 - 5:41

score 52 · Answer 11 · 2019-04-13 23:38:00

52

Views

If $f^{-1}(j)\leq f(j)$ for all $j$ then $f=f^{-1}$

Published on 13 Apr 2019 - 23:38

score 2k · Answer 12 · 2026-03-25 11:03:40

2k

Views

Number of different necklaces with $2$ black and $6$ white beads

Published on 25 Mar 2026 - 11:03

score 94 · Answer 13 · 2026-03-29 13:46:46

94

Views

Permutation graph and the number of inversion statistics

Published on 29 Mar 2026 - 13:46

score 3.1k · Answer 14 · 2026-03-31 05:41:30

3.1k

Views

Number of $7$-digit telephone numbers with non-decreasing digits? strictly increasing digits?

Published on 31 Mar 2026 - 5:41

score 36 · Answer 15 · 2019-04-15 01:46:52

36

Views

Possible ways to sort elements of set so that all elements of type x are next to each other.

Published on 15 Apr 2019 - 1:46

List Question

In how many ways can we place $3$ red and $4$ blue balls into $3$ indistinguishable boxes so that no box is empty?

Average distance moved by a permutation

Estimate number of permutations with unknown number of variables

The no. of possible $3$ digit number $abc$ if $a,b,c$ are the sides of a isosceles triangle.

How limitations affect the number of possible pandigital numbers

arranging 2 blue balls, 2 red balls and 1 green ball

Using Draw Blanks approach to solve a probability question of drawing 2 red, 2 blue and 1 green marbles.

If a fair coin is flipped 5 times, what is the probability of getting exactly 3 heads

Is there a good way to show that the order of element in $S_7$ are at most $12$?

A question about contestants linked with combinations

If $f^{-1}(j)\leq f(j)$ for all $j$ then $f=f^{-1}$

Number of different necklaces with $2$ black and $6$ white beads

Permutation graph and the number of inversion statistics

Number of $7$-digit telephone numbers with non-decreasing digits? strictly increasing digits?

Possible ways to sort elements of set so that all elements of type x are next to each other.

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