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Problem Solving Using Theoretical Probabilities Quick Check
2 of 52 of 5 Items

Question
Galina spins a spinner with three equally sized colored sections: red, green, and purple. She also rolls a number cube. Which event below has the highest likelihood of occurring?(1 point)
Responses

The spinner lands on either green or red, and the number cube lands on 6.
The spinner lands on either green or red, and the number cube lands on 6.

The spinner lands on red, and the number cube lands on an even number.
The spinner lands on red, and the number cube lands on an even number.

The spinner lands on red, and the number cube lands on 6.
The spinner lands on red, and the number cube lands on 6.

The spinner lands on either purple or red, and the number cube lands on 3.
The spinner lands on either purple or red, and the number cube lands on 3.

1 answer

To determine which event has the highest likelihood of occurring, let's analyze the probabilities for each option.

  1. The spinner lands on either green or red, and the number cube lands on 6.

    • Probability of the spinner landing on green or red: \( \frac{2}{3} \) (2 favorable outcomes: green, red)
    • Probability of the number cube landing on 6: \( \frac{1}{6} \)
    • Combined probability: \( \frac{2}{3} \times \frac{1}{6} = \frac{2}{18} = \frac{1}{9} \)
  2. The spinner lands on red, and the number cube lands on an even number.

    • Probability of the spinner landing on red: \( \frac{1}{3} \)
    • Probability of the number cube landing on an even number (2, 4, or 6): \( \frac{3}{6} = \frac{1}{2} \)
    • Combined probability: \( \frac{1}{3} \times \frac{1}{2} = \frac{1}{6} \)
  3. The spinner lands on red, and the number cube lands on 6.

    • Probability of the spinner landing on red: \( \frac{1}{3} \)
    • Probability of the number cube landing on 6: \( \frac{1}{6} \)
    • Combined probability: \( \frac{1}{3} \times \frac{1}{6} = \frac{1}{18} \)
  4. The spinner lands on either purple or red, and the number cube lands on 3.

    • Probability of the spinner landing on purple or red: \( \frac{2}{3} \) (2 favorable outcomes: purple, red)
    • Probability of the number cube landing on 3: \( \frac{1}{6} \)
    • Combined probability: \( \frac{2}{3} \times \frac{1}{6} = \frac{2}{18} = \frac{1}{9} \)

Now let's summarize the combined probabilities:

  • Option 1: \( \frac{1}{9} \)
  • Option 2: \( \frac{1}{6} \)
  • Option 3: \( \frac{1}{18} \)
  • Option 4: \( \frac{1}{9} \)

The event with the highest probability is Option 2: "The spinner lands on red, and the number cube lands on an even number" with a probability of \( \frac{1}{6} \).