1. **State the problem:** We want to find the probability of drawing an ace or a jack from a standard deck of 52 cards. 2. **Formula:** The probability of an event is given by $$\text{Probability} = \frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}}$$ 3. **Count favorable outcomes:** There are 4 aces and 4 jacks in the deck. 4. **Calculate total favorable outcomes:** $$4 + 4 = 8$$ 5. **Calculate probability:** $$\frac{8}{52} = \frac{\cancel{4} \times 2}{\cancel{4} \times 13} = \frac{2}{13}$$ 6. **Answer:** The probability of drawing an ace or a jack is $\frac{2}{13}$.