Final answer:
The probability of choosing the card with the number 4 depends on the total number of cards in the deck. Without knowing the total number of cards, we cannot determine the probability.
Step-by-step explanation:
The probability of choosing the card with the number 4 depends on the total number of cards in the deck. If there are 40 cards in the deck, and only one of them is number 4, then the probability is 1/40. However, if there are 52 cards in the deck and four of them are number 4, then the probability is 4/52, which simplifies to 1/13. Therefore, without knowing the total number of cards in the deck, we cannot determine the probability of choosing the card with the number 4.