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Questions Tagged with "combinatorics" (Page 4)

Explore solved questions tagged with "combinatorics" or help others by answering their unsolved questions related to "combinatorics".

Number of permutations of the letters $a, b, c, d$ such that $b$ does not follow $a$, and $c$ does not follow $b$, and $d$ does not follow $c$

2 answer

Mathematics Asked 2 years ago

Counting circuits with constraints

1 answer

Computer Science Asked 2 years ago by Judy L.

Some Combinatorics and Some Prime Numbers

3 answer

Mathematics Asked 3 years ago by Shubhrajit Bhattacharya

Sum involving the set of all possible combinations with at most two repetitions

2 answer

Mathematics Asked 3 years ago by Sharik

The number of types on a set is equal to $binom{n + m - 1}{m - 1}$?

1 answer

Mathematics Asked 3 years ago by ironX

A donut shop sells 12 types of donuts. A manager wants to buy six donuts, one for himself and 5 for his employees.

1 answer

Mathematics Asked 3 years ago by Daniel Sidorkin

Maximization problem on finite collection of finite sets

1 answer

Computer Science Asked 3 years ago by yuezato

Suppose that $N$ and $r$ are positive integers. Prove or disprove that if $N$ is an even integer and $r$ is odd, then $binom{N}{r}$ is even.

3 answer

Mathematics Asked 3 years ago by s1mple

Combinatorics doubts

1 answer

Mathematics Asked 3 years ago by Pietro Morri

Best approximation of sum of unit vectors by a smaller subset

2 answer

Mathematics Asked 3 years ago by g g

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