To create a probability model for the experiment of picking a card from the number cards 2, 4, 6, and 10, we need to determine the probabilities associated with each card.
Since there are a total of 4 cards and we assume each card has an equal chance of being selected, the probability of selecting any one card is:
\[ P(X = x) = \frac{1}{4} \]
for each \(x\) in {2, 4, 6, 10}.
We can express this probability model in function form as:
\[ f(x) = \frac{1}{4}, \text{ where } x \in {2, 4, 6, 10} \]
This represents that the probability \(f(x)\) of picking each card (2, 4, 6, or 10) is \(\frac{1}{4}\).