MA19.7.13
Use a number from 0 to 1 to represent the probability of a chance event occurring, explaining that larger numbers indicate greater likelihood of the event occurring, while a number near zero indicates an unlikely event.
Use a number from 0 to 1 to represent the probability of a chance event occurring, explaining that larger numbers indicate greater likelihood of the event occurring, while a number near zero indicates an unlikely event.
Unpacked Content
UP:MA19.7.13
Vocabulary
- probability
- Event
- Chance
- likely
- Unlikely
- very unlikely
- very likely
- Equally likely
- Impossible
- Certain
Knowledge
Students know:
- probability is equal to the ratio of favorable number of outcomes to total possible number of outcomes.
- As a number for probability increases, so does the likelihood of the event occurring.
- A probability near 0 indicates an unlikely event.
- A probability around 1/2 indicates an event that is neither unlikely nor likely.
- A probability near 1 indicates a likely event.
Skills
Students are able to:
- approximate the probability of a chance event.
- Use words like impossible, very unlikely, unlikely, equally likely/unlikely, likely, very likely, and certain to describe the probabilities of events.
Understanding
Students understand that:
- the probability of a chance event is a number between 0 and 1 that expresses the likelihood of the event occurring.
- An event that is equally likely or equally unlikely has a probability of about 0.5 or ½.
- The sum of the probabilities of an event and its complement must be 1.
