CK-12 Basic Probability and Statistics - A Short Course

http://www.ck12.org Chapter 3. Discrete Random Variables - Basic

Tree Diagram

A branching diagram used to list all the possible outcomes of a compound event.

Review Questions

1. Define and give three examples of discrete random variables.


2. Draw a tree diagram to represent the tossing of two coins and determine the probability of getting at least one
   head.


3. Draw a tree diagram to represent the tossing of one coin three times and determine the probability of getting
   at least one head.


4. Draw a tree diagram to represent the drawing two marbles from a bag containing blue, green, and red marbles
   and determine the probability of getting at least one red.


5. Draw a tree diagram to represent the drawing two marbles from a bag containing blue, green, and red marbles
   and determine the probability of getting at two blue marbles.

Possible Outcomes :

BB,BG,BR,GB,GG,GR,RB,RG,RR

P(two blue marbles) =

1

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