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

There are 13 club cards in a deck of 52 cards, so the probability of picking a club card is:

Number of club cards / Total number of cards = 13 / 52 = 1 / 4

Therefore, the theoretical probability of picking a club card is 1/4.