MA19.7A.29

Mathematics (2019) Grade(s): 7 - Grade 7 Accelerated

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.
probability is equal to the ratio of favorable number of outcomes to total possible number of outcomes.

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.

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.