1. 0-11 Probability Goal: Find the probability of an event occurring.
Eligible Content: A

2. Vocabulary Probability The likelihood of something happening.
Can be written as a fraction, decimal or percent.
Can be any number from 0 to 1.
Probability = 0 means something cannot happen.
Probability = 1 means it will definitely happen.

3. To Find Probability:

4. Examples
Find the probability that a person randomly selected in this class will:
Be a girl.
Wear glasses.
Have brown hair.
Be an only child.

5. Rolling a Die Examples
You are rolling a six sided die. Find the probability of rolling: 2
0.17
An even number
0.5
A number less than 5
0.67

6. Marbles Examples
You have a bag with the following marbles: 8 green, 3 red, 5 orange, 2 blue, 1 purple and 1 yellow.
Find the probability of randomly selecting:
Green
Red
Orange or purple
A primary color
0.4
0.15
0.3
0.3

7. Spinner Examples
Find the probability of spinning the following on the spinner. A
0.4 B C
0.2 A B B A C

8. Deck of Cards 52 cards 13 diamonds 13 hearts 13 clubs 13 spades
4 of each number from 1-10 (1 is Ace)
4 of each face card (Jack, Queen, King)

9. Card Examples Find the probability of randomly selecting: A king
0.08
A diamond
0.25
A black card
0.5
A red face card
0.12
An even number
0.38

10. Practice
Worksheet – “0-11 Probability”

11. Homework
Worksheet – “0-11 Probability Homework”