Tree Diagrams

Andymath.com features free videos, notes, and practice problems with answers! Printable pages make math easy. Are you ready to be a mathmagician?

Lesson


Problems & Videos

Jon is playing 2 basketball games in a tournament today. The probability his team wins the first game is 65%. If they win the first game, the probability of winning the second is 80%. If the lose the first game the probability of winning the second is 45%.

\(\textbf{1)}\) Sketch out a tree diagram showing this scenario.
\(\textbf{2)}\) What is the probability they win both games?
\(\textbf{3)}\) What is the probability they lose both games?
\(\textbf{4)}\) What is the probability they win exactly 1 game?
\(\textbf{5)}\) What is the probability they win at least 1 game?




Below is a tree diagram showing the probability of customers of a restaurant ordering salad, and the effect that has on the probability they order juice. Answer the following questions.

Tree Diagram for Questions 6-10

\(\textbf{6)}\) What is the probability a customer orders a salad and juice?Link to Youtube Video Solving Question Number 6
\(\textbf{7)}\) What is the probability a customer orders juice?Link to Youtube Video Solving Question Number 7
\(\textbf{8)}\) What is the probability a customer orders juice given they ordered a salad?Link to Youtube Video Solving Question Number 8
\(\textbf{9)}\) What is the probability a customer orders salad given they ordered juice?Link to Youtube Video Solving Question Number 9
\(\textbf{10)}\) What is the probability a customer did not order salad?Link to Youtube Video Solving Question Number 10


See Related Pages\(\)

\(\bullet\text{ Statistics Homepage}\)
\(\,\,\,\,\,\,\,\,\text{All the Best Topics…}\)
\(\bullet\text{ Conditional Probabilites}\)
\(\,\,\,\,\,\,\,\,P(A|B)=\displaystyle\frac{P(A \cap B}{P(B)}…\)
\(\bullet\text{ Independent Events}\)
\(\,\,\,\,\,\,\,\,P(A \cap B)=P(A)P(B)…\)
\(\bullet\text{ Mutually Exclusive Events}\)
\(\,\,\,\,\,\,\,\,P(A \cap B)=0…\)
\(\bullet\text{ Venn Diagrams}\)
\(\,\,\,\,\,\,\,\,\)Thumbnail for Venn Diagrams
\(\bullet\text{ Two-Way Tables}\)
\(\,\,\,\,\,\,\,\,\)Thumbnail for Two-way Tables


In Summary

A tree diagram is a graphical representation of possible outcomes in a probability experiment. It shows all of the possible outcomes in a hierarchical structure, with the branches of the tree representing each possible outcome and its probability.

To create a tree diagram, you first need to identify the possible outcomes of the experiment and their probabilities. These probabilities should be expressed as fractions or decimals, and should sum to 1 (since there is a 100% chance that one of the outcomes will occur).

Once you have identified the possible outcomes and their probabilities, you can create the tree diagram by starting with a single root node that represents the beginning of the experiment. Then, for each possible outcome, you would add a branch to the tree diagram that represents that outcome and its probability. This process is repeated for each subsequent possible outcome, until the tree is complete.

Tree diagrams can be used for many different types of problems, including decision making, statistical analysis, and game theory. They are a useful tool for visualizing complex processes and can help you better understand the relationships between different events.

About Andymath.com

Andymath.com is a free math website with the mission of helping students, teachers and tutors find helpful notes, useful sample problems with answers including step by step solutions, and other related materials to supplement classroom learning. If you have any requests for additional content, please contact Andy at tutoring@andymath.com. He will promptly add the content.

Topics cover Elementary Math, Middle School, Algebra, Geometry, Algebra 2/Pre-calculus/Trig, Calculus and Probability/Statistics. In the future, I hope to add Physics and Linear Algebra content.

Visit me on Youtube, Tiktok, Instagram and Facebook. Andymath content has a unique approach to presenting mathematics. The clear explanations, strong visuals mixed with dry humor regularly get millions of views. We are open to collaborations of all types, please contact Andy at tutoring@andymath.com for all enquiries. To offer financial support, visit my Patreon page. Let’s help students understand the math way of thinking!

Thank you for visiting. How exciting!