Grade 4

Read the Headline Story to the students. Encourage them to draw diagrams of possible spinners and to think of other creative ways to solve the problem.

Hannah made a spinner with sections colored red, yellow, and blue, but it wasn’t a fair spinner. The spinner was most likely to land on blue and least likely to land on red. The probability of landing on yellow was . What can you say about the probability of landing on blue?

- The probability of landing on yellow is , so the probability of
*not*landing on yellow is . - The probability of landing on blue is greater than , because blue is more likely than yellow.
- The probability of landing on blue must also be less then , because there’s at least a small chance of landing on red.

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