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Common Core Mathematics 9-12 
 ClusterCalculate expected values and use them to solve problems
Topics1. Using Probability to Make Decisions; 2. Modeling
   Grade 9-12
  S.MD.3.(+) Develop a probability distribution for a random variable defined for a sample space in which theoretical probabilities can be calculated; find the expected value. For example, find the theoretical probability distribution for the number of correct answers obtained by guessing on all five questions of a multiple-choice test where each question has four choices, and find the expected grade under various grading schemes.