Discrete Mathematics Calculators

Basic Calculator

calculator

formula

Factorial Calculator

Multifactorial Calculator

n!, n!!, n!!!, n!!!!, n!!!!!

Even Permutations Calculator

n! / 2

Odd Permutations Calculator

n! / 2, n >= 2

Circular Permutation Calculator

Pn = P(n) = (n - 1)!

Sample Selection Calculators

There are four different ways in which a sample of r elements can be obtained from a set of n objects.

Sample Selection Calculators

calculator

formula

order
matters ?

replace-ments
allowed ?

Combinations Calculator

nCr = C(n,r) = n! / ( r! (n - r)! )

Permutations Calculator

nPr = P(n,r) = n! / (n - r)!

Yes

Combinations Replacement Calculator

C^R(n,r) = C(n+r-1,r)

Yes

Permutations Replacement Calculator

P^R(n,r) = n^r

Yes