Probability tree diagram illustrating the outcomes and probabilities of two selections, with branches for red (R) and blue (B) events.

$Tree diagram showing probabilities for 1st and 2nd selection of red (R) and blue (B) outcomes with fractions 4/9, 5/9, 3/8, 5/8, 4/8, and 4/8.$

Tree diagram showing probabilities for 1st and 2nd selection of red (R) and blue (B) outcomes with fractions 4/9, 5/9, 3/8, 5/8, 4/8, and 4/8.

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Show Answer Key & Explanations Step-by-step solution for: Unit 7.5-7.6: Expressing Probability & Tree Diagrams - MR

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- The probability of selecting a red ball first and then a red ball second is (4/9) * (3/8) = 12/72 = 1/6.
- The probability of selecting a red ball first and then a blue ball second is (4/9) * (5/8) = 20/72 = 5/18.
- The probability of selecting a blue ball first and then a red ball second is (5/9) * (4/8) = 20/72 = 5/18.
- The probability of selecting a blue ball first and then a blue ball second is (5/9) * (4/8) = 20/72 = 5/18.

Parent Tip: Review the logic above to help your child master the concept of probability tree diagrams worksheets.

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