Introduction to Probability NOTES & PRACTICE

Calculate the probability of a simple event as a fraction, decimal, and percentage

Classify a calculated probability using likelihood language (impossible, less likely, neither likely nor unlikely, more likely, certain) and place it on a 0-to-1 number line

Work through the coin and dice examples on the notes page as a class before assigning the number line and test practice sections independently, since the later problems reuse the same fraction/decimal/percentage format introduced there.

Use the Google Forms version of the test practice for a self-checking digital assignment, or the printable PDF version for in-class paper practice.

Have students show their probability calculation next to each number line placement, not just the final letter — the number line practice pages leave room for the fraction work alongside each lettered event. Apply probability calculations in this probability color-by-number activity.

Calculating probability as a ratio of desired outcomes to total outcomes, expressed as a fraction, decimal, and percentage.

Classifying and placing a probability on a likelihood scale from impossible (0) to certain (1), including comparing which of several events is more or less likely.