School Improvement in Maryland
Sample Item Scoring Information Return

Standard 5.0 Knowledge of Probability

Topic A. Sample Space

Indicator 1. Identify a sample space

Objective b. Determine the number of outcomes

Selected Response (SR) Item

At Maryland Middle School, there are 9 mathematics classes. If two mathematics classes are selected for a school competition, what is the number of possible outcomes?

  1. 8
  2. 9
  3. 72
  4. 81

Correct Answer
C. 72

Answer Annotation

  1. 8 (number of classes minus one)
     
  2. 9 (number of classes)
     
  3. 72 (correct answer)
     
  4. 81 (number of classes squared)
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