Pelan

Kalkulator Pilih Atur dan Gabungan

Masukkan n (bilangan item untuk dipilih) dan r (item yang dipilih).

Keputusan

Masukkan nilai dan tekan Kira untuk melihat keputusan.

Formula

nPr=n!(n−r)!{}_nP_r = \frac{n!}{(n - r)!}

Permutations: order matters.

nCr=n!r! (n−r)!{}_nC_r = \frac{n!}{r!\,(n - r)!}

Combinations: order does not matter.

Cara menggunakan kalkulator ini

  1. Enter whole numbers with r no bigger than n.
  2. Press Calculate to get both counts.

Contoh berserta jalan kerja

Choose 2 from 5

5P2 = 5 × 4 = 20 ordered arrangements.

5C2 = 20 / 2! = 10 unordered selections.

Soalan lazim

When does order matter?

For rankings or codes (permutations). For teams or hands of cards, order doesn’t matter (combinations).

Are the answers exact?

Yes — even very large counts are computed exactly.

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