A dice is rolled. List the outcomes of the event A if:
A is the event that a number less than or equal to 3 appears.

Answer

To solve the problem, we need to determine the outcomes of the event A when a die is rolled, where event A is defined as the occurrence of a number less than or equal to 3.

### Step-by-Step Solution:

1. **Identify the Total Outcomes of a Die Roll**:
A standard die has six faces, numbered from 1 to 6. Therefore, the total possible outcomes when rolling a die are:
\[ \{1, 2, 3, 4, 5, 6\} \]

2. **Define the Event A**:
Event A is defined as the event where the outcome is a number less than or equal to 3. We need to identify which numbers from the total outcomes fit this criterion.

3. **List the Outcomes for Event A**:
Now, we will list the numbers from the total outcomes that are less than or equal to 3:
- The numbers that are less than or equal to 3 are: 1, 2, and 3.

4. **Write the Outcomes of Event A**:
Therefore, the outcomes of event A are:
\[ A = \{1, 2, 3\} \]

### Final Answer:
The outcomes of event A, where a number less than or equal to 3 appears when a die is rolled, are:
\[ \{1, 2, 3\} \]

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