# Surf for More Math

## CHAPTER 10: PROBABILITY

**Lesson 5: Using Tree Diagrams to Calculate Probability **

Use these interactive activities to encourage students to have fun on the Web while learning about probability. Students can try these activities on their own or in pairs.

**Goal**

Determine probabilities using a tree diagram.

**Builds Upon**

Student Book pages 448–451

**Instructions for Use**

**On Stage Probability** allows students to solve a problem using a tree diagram and practice interpreting tree diagrams.

Follow the instructions to solve the problem about who will get the parts of Dorothy, the Tin Man, the Scarecrow, and the Lion in the school play. You will use a tree diagram to display possible outcomes for who will play each part. You can then use this tree to answer various probability questions.

**Me Too Probability** allows students to solve a problem using a tree diagram and practice interpreting tree diagrams.

Follow the instructions to solve the problem about who is coming to the party. You will use a tree diagram to display possible outcomes for who will come to the party. You can then use this tree to answer various probability questions about the guests.