Problem-Solving and Data AnalysisEasy–MediumProbability of not drawing green
Problem-Solving and Data Analysis practice question
A bag contains 4 red, 3 blue and 5 green marbles. One marble is drawn at random. What is the probability that it is not green?
Answer: 7/12
7 of the 12 marbles are not green.
Common wrong answers
- If you answered 5/12
- 5/12 is the probability of green.
- If you answered 7/5
- 7/5 divides by the green count instead of the total.
- If you answered 1/3
- 1/3 is the probability of red.
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