i don't know where else to post this but i need some help on a textbook question i was given about combinatorics.
there is a game that involves a murderer, a mansion, and the weapon used to commit the murder. there are 5 characters in all, 7 rooms in the mansion, and 3 weapons.
the question is.. how many kinds of guesses can i make from choosing one character, one mansion room, and one weapon?
what kind of formula do i use for this, nPr or nCr? or can i use the fundamental counting principle?