What is the probability of pulling a 4 out of a deck of cards of 10?

To determine the probability of pulling a 4 out of a deck of cards of 10, we need to know how many 4s are in the deck. If there are no 4s in the deck, the probability would be 0. However, if there are 4 4s in the deck, the probability would be 4/10 or 2/5.

Therefore, the probability of pulling a 4 out of a deck of cards of 10 depends on the number of 4s in the deck.