School Improvement in Maryland

Sample Item
Selected Response Item for Grade 8

Standard 5.0 Knowledge of Probability

Topic B. Theoretical Probability

Indicator 2. Determine the probability of a second event that is dependent on a first event of equally likely outcomes

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

Assessment limit: Use a sample space of no more than 60 outcomes

A box contains 5 bags of potato chips, 4 bags of pretzels and 1 bag of corn chips. Andre reaches in the box and randomly picks two bags, one after the other. What is the probability that Andre chooses a bag of potato chips if the first bag was pretzels?

  1. 1/10
  2. 4/9
  3. 1/2
  4. 5/9

Correct Answer
D. 5/9
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