1. The problem asks for the probability of rolling a 3 on a die. 2. A standard die has 6 faces numbered from 1 to 6. 3. Each face is equally likely to appear when the die is rolled. 4. The number of favorable outcomes (rolling a 3) is 1. 5. The total number of possible outcomes is 6. 6. Probability is calculated as the ratio of favorable outcomes to total outcomes: $$\text{Probability} = \frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}} = \frac{1}{6}$$ 7. Therefore, the probability of rolling a 3 on a die is $\frac{1}{6}$.