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General Information

Related Standards: MAFS.7.SP.3.7
Reporting Category: Statistics & Probability
Type: EE: Equation Editor
Difficulty: N/A
Question:
A bag contains 3 red marbles and 6 blue marbles. 

What is the probability of randomly selecting a red marble from the bag?


Aligned Standards

Code Description
MAFS.7.SP.3.7: Develop a probability model and use it to find probabilities of events. Compare probabilities from a model to observed frequencies; if the agreement is not good, explain possible sources of the discrepancy.
  1. Develop a uniform probability model by assigning equal probability to all outcomes, and use the model to determine probabilities of events. For example, if a student is selected at random from a class, find the probability that Jane will be selected and the probability that a girl will be selected.
  2. Develop a probability model (which may not be uniform) by observing frequencies in data generated from a chance process. For example, find the approximate probability that a spinning penny will land heads up or that a tossed paper cup will land open-end down. Do the outcomes for the spinning penny appear to be equally likely based on the observed frequencies?


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