Instructional Video

How to Add Probabilites and Multiply Probabilities Using Marbles

Curated and Reviewed by Lesson Planet

Do you want a red marble and a green marble, or do you want a red marble or a green marble? Calculating the probability in these two situations is very different. Use the fifth video in a series of six to explain the difference in the two models. Scholars learn when to add and multiply when working with probability.

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CCSS: Adaptable
Additional Tags
Instructional Ideas
  • Use screen shots from the video to develop a presentation to incorporate guided practice throughout the lesson
  • Emphasize the difference between a situation where probabilities are added or multiplied; an addition problem is only one even, but a multiplication problem has multiple events
Classroom Considerations
  • Requires Internet access to view the YouTube video
  • This video is hosted on YouTube
Pros
  • Animations help to visualize the problems and make connections to the calculations
  • The explanations are clear and concise
Cons
  • The video does not explain the reason addition or multiplication is appropriate for each situation
Common Core