Education Technology

Probability of Repeated Independent Events

Activity Overview

Investigate probability by simulating tossing a coin three times.


  • Students will identify the sample space of an experiment involving repeated independent trials.
  • Students will calculate the probability of multiple independent events occurring.
  • Students will gain understanding of the distinction of the relationship between theoretical and experimental probability.
  • Reason abstractly and quantitatively. (CCSS Mathematical Practice)
  • Look for and express regularity in repeated reasoning. (CCSS Mathematical Practice)


  • experiment
  • outcomes
  • sample space
  • event
  • independent event
  • dependent event
  • probability tree diagram

About the Lesson

This lesson involves an investigation of probability by simulating tossing a coin three times.

As a result, students will:

  • Understand probability of specific outcomes of repeated independent trials.
  • Understand using a probability tree diagram to determine probability.