ITOM 2016 Phase I Note 1

Descrição

Note of chossing r objects out of n objects.
Sin Kei Chan
Notas por Sin Kei Chan, atualizado more than 1 year ago
Sin Kei Chan
Criado por Sin Kei Chan quase 8 anos atrás
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Resumo de Recurso

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| Order matters | Order does not matter--------------------------------------------------------------------------------------------------------------------------------------------------Repetition allowed | n^r | nHr = n+r-1Cr--------------------------------------------------------------------------------------------------------------------------------------------------Repetition not allowed | n(n-1)(n-2)...(n-r+1)=n!/(n-r)!=nPr | n(n-1)(n-2)...(n-r+1)/2=n!/r!(n-r)!=nCr

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