13.1 & 13.2
13.1 Find Probabilities and
Odds
13.2 Find Probabilities
Using Permutations
VOCABULARY 13.1
TYPES OF PROBABILITY
ODDS
EXAMPLE 1- SAMPLE SPACE
(TREE DIAGRAMS HELP)
Find the number of possible outcomes in the sample
space. Then list the possible outcomes.
1. A bag contains 4 red cards numbered 1-4, 4 white
cards numbered 1-4, and 4 black cards numbered 1-4.
You choose a card at random.
2. You roll a number cube and toss a coin.
Example 2: Theoretical Probability/Odds
EXAMPLE 3 EXPERIMENTAL PROBABILITY
VOCABULARY 13.2
To find permutations, use FACTORIALS written as: n!
From above, 3 letters so 3! = 3∙2∙1
EXAMPLE 1- COUNTING PERMUTATIONS
Find the number of ways you can arrange:
a) All of the letters in the given word
b) 3 letters in the word
Words:
1. Family
2. Pencils
EXAMPLE 2- EVALUATE THE EXPRESSION
1. 5!
2. 10!
3.
4.
7P2
25P5
EXAMPLE 3- WORD PROBLEM
You plan to visit 4 stores during a
shopping trip. In how many orders can
you visit these stores?
HOMEWORK
13.1 B Worksheet AND
Pages 853-855 #6-32 even and 36