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Counting: permutations and combinations

Factorials, ordered and unordered selections.

n! counts the orderings of n things. Choosing k of them in order is n!/(n − k)!; ignoring the order divides by k! again, giving the binomial coefficient “n choose k”. These numbers are Pascal's triangle and the coefficients of (a + b)ⁿ.

उदाहरण: 5 choose 2

Arithmetic · Arithmetic

Evaluate 10

10

चरणद्वारा चरण

  1. 10 = 10

    Evaluate.

जवाफ प्रकट गर्नुहोस्
10

तपाईँको आफ्नै प्रयास गर्नुहोस्

यसमा थप Statistics & Probability

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