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MMLU / At breakfast, lunch, and dinner, Joe randomly chooses with equal probabilities…

Problem

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question

At breakfast, lunch, and dinner, Joe randomly chooses with equal probabilities either an apple, an orange, or a banana to eat. On a given day, what is the probability that Joe will eat at least two different kinds of fruit?

choices

  1. \frac{7}{9}
  2. \frac{8}{9}
  3. \frac{5}{9}
  4. \frac{9}{11}

subject

high_school_mathematics

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