📚 Topic Summary
Probability is all about figuring out how likely something is to happen. It's used everywhere, from weather forecasts to deciding if a game is fair! A probability is always a number between 0 and 1, where 0 means something will never happen, and 1 means it definitely will. We often express probability as a fraction, decimal, or percentage.
In middle school, we focus on simple probabilities, like the chance of flipping heads on a coin or drawing a specific card from a deck. Understanding these basics is key to tackling more complex problems later on. So, let's get started with some fun activities!
🧮 Part A: Vocabulary
Match the term with its correct definition:
- Term: Event
- Term: Outcome
- Term: Probability
- Term: Sample Space
- Term: Independent Events
- Definition: The set of all possible outcomes of an experiment.
- Definition: Events where the outcome of one does not affect the outcome of the other.
- Definition: A possible result of an experiment.
- Definition: The measure of how likely an event is to occur.
- Definition: A set of outcomes to which a probability is assigned.
✍️ Part B: Fill in the Blanks
Complete the following paragraph using the words: certain, impossible, likely, equally likely, unlikely.
If an event has a probability of 1, it is considered __________. If an event has a probability of 0, it is __________. An event with a probability close to 1 is __________, while an event with a probability close to 0 is __________. When two events have the same chance of occurring, they are __________.
🤔 Part C: Critical Thinking
Imagine you have a bag with 3 red marbles and 5 blue marbles. If you pick one marble without looking, is it more likely to be red or blue? Explain your answer using probability.