What's the Chance?

Probability measures how likely an event is to happen. It's a number between 0 (impossible) and 1 (certain). We use probability to make predictions about random events.

Rules of Probability

• The probability of something happening: \( P(A) \)
• The probability of something not happening: \( 1 - P(A) \)
• If two events can't happen together: \( P(A \text{ or } B) = P(A) + P(B) \)

Real Life Examples

Probability helps in games, weather forecasting, and insurance.

• Flipping a coin: Probability of heads is 0.5.
• Rolling a die: Probability of getting a 4 is \( \frac{1}{6} \).

Why It Matters

Probability helps us plan, take risks wisely, and understand randomness in the world around us.