This is a Discrete Math Question (Sets, Combinatorics, and Probability).

A 5 card hand from a standard 52 card deck.

(There are 13 cards from each of 4 suits: clubs, diamonds, hearts, spades in a standard deck.

There are values 2 through 10 in the 13 cards, Jack, Queen, King, and Ace.

Face cards refer to Jack, Queen or King).

Question:

How many hands are all face cards?

(The number of face cards = 3 cards each 4 kinds = 3 x 4 = 12 cards).