Problem-Solving and Data AnalysisEasyProbability from a spinner with repeated colours
Problem-Solving and Data Analysis practice question
A spinner is divided into three equal sections: two are red and one is blue. What is the probability that the spinner lands on blue?
- A. 1/3Correct
- B. 1/2
- C. 2/3
- D. 1/4
Answer: A. 1/3
One of three equal sections is blue: 1/3.
Why the other answers are wrong
- B. 1/2
- 1/2 would be right if there were two colours in equal shares, but red has two sections and blue only one.
- C. 2/3
- 2/3 is the probability of RED.
- D. 1/4
- 1/4 would need four equal sections.
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