Where does this definition of permutation and combination come from?
This entry for permutation and combination is sourced from GetWord Corpus, one of the dictionaries and corpora merged into Lughet.
Is permutation and combination a noun, verb, or something else?
In this entry, permutation and combination is tagged as 2n..
What is Lughet?
Lughet is a free trilingual dictionary covering nearly five million entries across Uyghur, Chinese, and English, drawn from more than ten source dictionaries and corpora.