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 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. 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

1 answer

To determine which event has the highest likelihood of occurring, we need to calculate the probabilities of each event.

  1. Spinner lands on either purple or red (2 out of 3 possibilities) and number cube lands on 3 (1 out of 6 possibilities): \[ P(\text{Purple or Red}) = \frac{2}{3}, \quad P(3) = \frac{1}{6} \] Combined probability: \[ P(\text{Event 1}) = \frac{2}{3} \times \frac{1}{6} = \frac{2}{18} = \frac{1}{9} \]

  2. Spinner lands on either green or red (2 out of 3 possibilities) and number cube lands on 6 (1 out of 6 possibilities): \[ P(\text{Green or Red}) = \frac{2}{3}, \quad P(6) = \frac{1}{6} \] Combined probability: \[ P(\text{Event 2}) = \frac{2}{3} \times \frac{1}{6} = \frac{2}{18} = \frac{1}{9} \]

  3. Spinner lands on red (1 out of 3 possibilities) and number cube lands on an even number (3 out of 6 possibilities): \[ P(\text{Red}) = \frac{1}{3}, \quad P(\text{Even}) = \frac{3}{6} = \frac{1}{2} \] Combined probability: \[ P(\text{Event 3}) = \frac{1}{3} \times \frac{1}{2} = \frac{1}{6} \]

  4. Spinner lands on red (1 out of 3 possibilities) and number cube lands on 6 (1 out of 6 possibilities): \[ P(\text{Event 4}) = \frac{1}{3} \times \frac{1}{6} = \frac{1}{18} \]

Now we can compare the probabilities:

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

To compare these fractions, we can convert them to have a common denominator (for example, 18):

  • Event 1: \( \frac{2}{18} \)
  • Event 2: \( \frac{2}{18} \)
  • Event 3: \( \frac{3}{18} \)
  • Event 4: \( \frac{1}{18} \)

The event with the highest probability is Event 3: The spinner lands on red, and the number cube lands on an even number, with a probability of \( \frac{1}{6} \).