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Lesson 1: The Language of Chance

About 30 minutes — Discussion-based lesson

What You Will Learn

This lesson covers:

What probability means: how likely something is to happen

This section covers the key ideas about what probability means: how likely something is to happen. Discuss with your group or family and explore the concepts together.

The probability scale: impossible (0) to certain (1)

This section covers the key ideas about the probability scale: impossible (0) to certain (1). Discuss with your group or family and explore the concepts together.

Vocabulary: likely, unlikely, equally likely, certain, impossible

This section covers the key ideas about vocabulary: likely, unlikely, equally likely, certain, impossible. Discuss with your group or family and explore the concepts together.

Real-life examples: weather forecasts, sports predictions, games

This section covers the key ideas about real-life examples: weather forecasts, sports predictions, games. Discuss with your group or family and explore the concepts together.

Check Your Understanding

1. What is probability?

Answer: A measure of how likely something is to happen, on a scale from impossible (0 or 0%) to certain (1 or 100%).

2. What does 'equally likely' mean?

Answer: When two or more outcomes have the same chance of happening. A fair coin has equally likely outcomes: 50% heads, 50% tails.

3. Is a 70% chance of rain a guarantee?

Answer: No! It means that in similar weather conditions, it rains about 70 out of 100 times. There is still a 30% chance it will not rain.

4. Why is understanding probability useful?

Answer: Because most decisions involve uncertainty. Understanding probability helps you assess risks, evaluate claims, and make better choices.

Key Takeaways

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