Combinatorics

Learn the notion of a factorial and a combinatorial number, as well as the principle of addition and multiplication, i.e. combinatorial concepts focused on solving counting problems such as variations, permutations and combinations.

  1. Combinations

    2 subjects

  2. Factorial and combinatorial numbers

    Difficulty: 5

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  3. Permutations

    2 subjects

  4. The principle of addition and multplication

    Difficulty: 6

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  5. Variations

    2 subjects