Understanding simple events is really important for learning about probability in Year 9 for a few reasons:

1. Basics of Probability: Simple events are like the building blocks of probability. When students learn to recognize them, it helps them understand more complicated events. For example, if you roll a die, the simple event outcomes are {1, 2, 3, 4, 5, 6}.

2. Finding Probability: To find the probability of a simple event, you can use this formula:
   $P(E) = \frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}}$
   So, if you want to find the probability of rolling a 4, it would look like this: $P(4) = \frac{1}{6}$.

3. Real-Life Use: Knowing about simple events helps with real-life situations that involve probability. This includes things like checking weather forecasts or planning strategies in games, where understanding probabilities can help you make better choices.

In summary, having a strong understanding of simple events helps students get a better grip on probability concepts and improve their critical thinking skills.