Directions for questions : Fill in the blanks.
The minimum value of the probability of an event is _______ .

Answer

To solve the question, we need to fill in the blank regarding the minimum value of the probability of an event.

### Step-by-Step Solution:

1. **Understanding Probability**:
Probability is a measure of the likelihood that an event will occur. It is defined mathematically as the ratio of the number of favorable outcomes to the total number of possible outcomes.

2. **Range of Probability**:
The probability of any event can range from 0 to 1.
- A probability of 0 means that the event cannot occur (it is impossible).
- A probability of 1 means that the event is certain to occur.

3. **Identifying the Minimum Value**:
Since the minimum probability indicates that an event cannot happen at all, we conclude that the minimum value of the probability of an event is 0.

4. **Final Answer**:
Therefore, the blank can be filled with "0".

### Answer:
The minimum value of the probability of an event is **0**.