1. 0-11 Probability Goal: Find the probability of an event occurring. Eligible Content: A1.2.3.3.1

2. 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. Vocabulary

3. To Find Probability:

4. Examples Find the probability that a person randomly selected in this class will: 1. Be a girl. 2. Wear glasses. 3. Have brown hair. 4. Be an only child.

5. Rolling a Die Examples You are rolling a six sided die. Find the probability of rolling: 1. 2 0.17 2. An even number 0.5 3. 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: 1. Green 2. Red 3. Orange or purple 4. A primary color 0.4 0.15 0.3

7. Spinner Examples Find the probability of spinning the following on the spinner. 1. A 0.4 2. B 0.4 3. C 0.2 A A B B 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: 1. A king 0.08 2. A diamond 0.25 3. A black card 0.5 4. A red face card 0.12 5. An even number 0.38

10. Practice Worksheet – “0-11 Probability”

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