School Improvement in Maryland
Sample Item Scoring Information Return

Standard 5.0 Knowledge of Probability

Topic B. Theoretical Probability

Indicator 1. Determine the probability of an event comprised of no more than 2 independent events

Objective a. Express the probability of an event as a fraction, a decimal, or a percent

Selected Response (SR) Item

Jose needs to pick a golf ball and golf club. He has 3 white golf balls and 1 yellow golf ball. Jose has 3 black-handled golf clubs and 2 yellow-handled golf clubs. What is the probability that he randomly selects a yellow golf ball and a yellow-handled golf club?

  1. 10%
  2. 25%
  3. 40%
  4. 50%

Correct Answer
A. 10%

Answer Annotation

  1. 10%    (correct answer)
  2. 25%    (only golf ball)
  3. 40%    (only club handle)
  4. 50%    (thinks 50-50)
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