Section 1
Understanding Equally Likely Outcomes and Fairness
Property
Outcomes are equally likely when each outcome has the same chance of occurring. The basic probability formula only applies when all outcomes are equally likely.
In this Grade 7 lesson from enVision Mathematics Chapter 7, students learn what probability is and how to express it as a ratio or percent on a scale from 0 to 1. Using spinners and number cubes, students practice describing the likelihood of outcomes as impossible, unlikely, likely, or certain, and determine whether a spinner is fair based on equally likely outcomes.
Section 1
Understanding Equally Likely Outcomes and Fairness
Outcomes are equally likely when each outcome has the same chance of occurring. The basic probability formula only applies when all outcomes are equally likely.
Section 2
Fairness: When Outcomes Are Not Equally Likely
Not all outcomes are equally likely just because they exist. Equal probability requires either experimental evidence or knowledge that outcomes have the same chance of occurring. When outcomes are not equally likely, theoretical probability cannot be calculated as .
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Section 1
Understanding Equally Likely Outcomes and Fairness
Outcomes are equally likely when each outcome has the same chance of occurring. The basic probability formula only applies when all outcomes are equally likely.
Section 2
Fairness: When Outcomes Are Not Equally Likely
Not all outcomes are equally likely just because they exist. Equal probability requires either experimental evidence or knowledge that outcomes have the same chance of occurring. When outcomes are not equally likely, theoretical probability cannot be calculated as .
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter