School Improvement in Maryland

Sample Item
Selected Response Item for Grade 6

Standard 5.0 Knowledge of Probability

Topic C. Experimental Probability

Indicator 1. Analyze the results of a probability experiment

Objective a. Make predictions and express the experimental probability as a fraction, a decimal, or a percent

Assessment limit: Use no more than 30 results in the sample space

Kathy tosses a penny 24 times. The penny lands either with the head side showing or the tail side showing. The data below shows how the penny lands each time.

Kathy tosses the penny 100 more times. Based on the experimental probability determined from the data, what percent of times do you expect the penny will land on heads?

  1. 18%
  2. 25%
  3. 42%
  4. 75%

Correct Answer
B. 25%
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