6.DS.A.2 · Unit 0
🎲 The Language of Probability
Learning goal: I can use probability words (certain, likely, unlikely, impossible, equally likely) to describe the chance of an outcome.
Language goal: I can describe likelihood using the words certain, likely, unlikely, and impossible.
💡 Learn it
We use probability words to describe how likely an outcome is, from impossible to certain.
If almost all outcomes give a result, it is likely; if very few do, it is unlikely.
When two outcomes have the same chance (like heads vs. tails on a fair coin), they are equally likely.
These words help predict which responses will be more or less common when you collect data.
Worked example. A spinner is mostly blue with a small red slice and no green. Describe landing on each color.
- Blue: likely (it covers most of the spinner).
- Red: unlikely (only a small slice).
- Green: impossible (there is no green).
✏️ Practice
Score: 0 / 4
1. Rolling a 7 on a standard 1–6 number cube is…
💡 A 1–6 cube has no 7.
2. The sun rising tomorrow is…
💡 It always happens.
3. A bag has 9 red and 1 blue marble. Drawing red is…
💡 Most marbles are red.
4. Flipping heads on a fair coin, compared to tails, is…
💡 A fair coin has two equal outcomes.
🎟️ Exit ticket
Name one certain event, one impossible event, and one likely event from your day, and explain each choice.