Explore the principles of statistics and probability, equipping high school students with essential skills for data analysis and informed decision-making.
Many situations involve more than one event. We use rules to find the probability of several events happening together or separately.
If events A and B can't happen at the same time (mutually exclusive):
\[ P(A \text{ or } B) = P(A) + P(B) \]
If events A and B are independent (one doesn't affect the other):
\[ P(A \text{ and } B) = P(A) \times P(B) \]
These rules help us make decisions in games, genetics, and even computer science.
Calculating the chance of drawing a red card OR a king from a deck of cards.
Finding the probability of flipping heads twice in a row with a fair coin.
Probability rules help us figure out the chances of combined events.