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GeoGebraClasse GeoGebra

Determining the Complement of a Spinner Event

Discover the complement of an event. Change the probability of an event on a spinner and observe the effect.

Putting It All Together

Answer these open ended questions on your own or with others to form deeper math connections.

What does the numerator of the complement represent?

Carey says that if the probability of not landing on a flower is , then the probability of landing on a flower is . Do you agree? Explain why or why not.

Jordan claims the probability of landing on a heart is , so not landing on a heart is . Do you agree? Explain using the spinner.

Use the spinner: What is the probability of landing on a clover or its complement? Show your work.

If you adjust the spinner so stars cover of the area, what is the probability of the complement event?

If you adjust the spinner so stars cover of the area, what is the probability of the complement event?