Lucy has a deck of 52 cards with 4 suits (hearts, spades, diamonds, and clubs), and each suit has cards numbered 1–13. What is the theoretical probability of her picking a 4 from the deck of cards? The answer should be a fraction. Remember to simplify.

There are 4 cards with the number 4 in each suit, so there are a total of 4*4 = 16 cards with the number 4 in the deck.

The total number of cards in the deck is 52.

Therefore, the theoretical probability of Lucy picking a 4 from the deck of cards is 16/52 = 4/13.

This fraction cannot be simplified any further.