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7-D-2-2

Page history last edited by Brenda Butz 6 years, 3 months ago

7.D.2.2 Calculate probability as a fraction of sample space or as a fraction of area. Express probabilities as percents, decimals and fractions.

In a Nutshell

Identify the number of desirable outcomes and total sample space and write them as a ratio. Write the probabilities in different forms.

Student Actions	Teacher Actions
Develop accurate and appropriate procedural fluency to calculate probability of an event using the ratio of size of event and size of sample space. Develop the ability to communicate mathematically the probability as a fraction, decimal or percent and describe what that means related to the sample space or area.	Pose purposeful questions about the connections among probability and sample spaces. Use and connect mathematical representations of probability to determine the number of desirable outcomes and the total sample space. Implement tasks that promote reasoning and problem solving based on the probability.
Key Understandings	Misconceptions
Identify number of desirable outcomes. Identify total sample space. Represent equivalent values as percents, decimals and fractions.	Students may confuse odds with probability. Students may invert desired outcomes and sample space.