maths.free › Statistics & Probability › Counting: permutations and combinations

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.

काम में एक अच्छी मिसाल: 5 choose 2

Arithmetic · Arithmetic

Evaluate 10

10

चरण द्वारा कदम

  1. 10 = 10

    Evaluate.

जवाब दिखाएँ
10

अपने आप की कोशिश करें

अधिक में Statistics & Probability

Sampling and dataDescribing data with graphsMean, median and modeProbabilityDiscrete random variablesContinuous random variablesThe normal distributionThe central limit theoremConfidence intervalsHypothesis testingComparing two samplesChi-square testsLinear regression and correlationANOVA and the F distribution