des.math.combin.count

Members

Functions

combinationCount

long combinationCount(long n, long k)

equals to fact(n) / ( fact(k) * fact( n-k ) )

fact

long fact(long n)

factorial

partialPermutationCount

long partialPermutationCount(long n, long k)

equals to fact(n) / fact(n-k)

• count