1. **Problem:** Find the probability of drawing a letter from the sequence \{1, A, e, 2, 3, b, 5, E\}. 2. **Step 1:** Identify total number of cards: $8$. 3. **Step 2:** Identify letters: $A, e, b, E$ (4 letters). 4. **Step 3:** Probability formula: $$P(\text{letter}) = \frac{\text{number of letters}}{\text{total cards}} = \frac{4}{8}$$ 5. **Step 4:** Simplify fraction: $$\frac{4}{8} = \frac{\cancel{4}}{\cancel{8}} = \frac{1}{2}$$ 6. **Answer:** The probability of drawing a letter is $\frac{1}{2}$.