1. Unit 8. Day 1.

2. Spinner Game
Groups of 3
Everyone pick a color

3. Spinner Game

4. Tally the spins as a group!!!
Rules of the game:
Decide who will go first.
Each person picks a color. Both players cannot pick the same color.
Each person takes a turn spinning the spinner and recording what color the spinner stops on.
The winner is the person whose color is the first to happen 𝟏𝟎 times.
Tally the spins as a group!!!

5. Which color was the first to occur 10 times?
Do you think it makes a difference who goes first to pick a color?
Which color would you pick to give you the best chance of winning the game? Why would you pick that color?

6. Below are three different spinners
Below are three different spinners. On which spinner is the green likely to win, unlikely to win, and equally likely to win?

7. Q: What is Probability? A: Huh?
Probability is a measure of how likely it is that an event will happen. A probability is indicated by a number between 0 and 1. Some events are certain to happen, while others are impossible. In most cases, the probability of an event happening is somewhere between certain and impossible.
Huh?

8. Probability is a measure of how likely it is that an event will happen
Probability is a measure of how likely it is that an event will happen. A probability is indicated by a number between 0 and 1. Some events are certain to happen, while others are impossible. In most cases, the probability of an event happening is somewhere between certain and impossible.
𝑢𝑛𝑙𝑖𝑘𝑒𝑙𝑦
𝑙𝑖𝑘𝑒𝑙𝑦
1 2 1
𝐼𝑚𝑝𝑜𝑠𝑠𝑖𝑏𝑙𝑒
𝐶𝑒𝑟𝑡𝑎𝑖𝑛
𝐸𝑞𝑢𝑎𝑙𝑙𝑦 𝑙𝑖𝑘𝑒𝑙𝑦
𝑡𝑜 𝑜𝑐𝑐𝑢𝑟 𝑜𝑟
𝑛𝑜𝑡 𝑜𝑐𝑐𝑢𝑟

9. 1 𝑢𝑛𝑙𝑖𝑘𝑒𝑙𝑦 𝑙𝑖𝑘𝑒𝑙𝑦 1 2 𝐼𝑚𝑝𝑜𝑠𝑠𝑖𝑏𝑙𝑒 𝐶𝑒𝑟𝑡𝑎𝑖𝑛 𝐸𝑞𝑢𝑎𝑙𝑙𝑦 𝑙𝑖𝑘𝑒𝑙𝑦
1 2 1
𝐼𝑚𝑝𝑜𝑠𝑠𝑖𝑏𝑙𝑒
𝐶𝑒𝑟𝑡𝑎𝑖𝑛
𝐸𝑞𝑢𝑎𝑙𝑙𝑦 𝑙𝑖𝑘𝑒𝑙𝑦
Selecting black
Selecting black
Selecting white

10. 1 P(A) = P(B) = P(C) = P(D) = P(E) = P(F) = P(G) = 1 1 A
1 2 1
𝐼𝑚𝑝𝑜𝑠𝑠𝑖𝑏𝑙𝑒
𝑢𝑛𝑙𝑖𝑘𝑒𝑙𝑦
𝑙𝑖𝑘𝑒𝑙𝑦
𝐶𝑒𝑟𝑡𝑎𝑖𝑛
𝐸𝑞𝑢𝑎𝑙𝑙𝑦 𝑙𝑖𝑘𝑒𝑙𝑦
P(A) = 1
A: A solid rock dropped in the water will sink.
B: Your full name will be drawn when a full name is selected randomly from a bag containing the full names of all of the students in your class.
C: A round disk with one side red and the other side yellow will land yellow side up when flipped.
D: You will see a live dinosaur on the way home from school today.
E: A red cube will be drawn when a cube is selected from a bag that has five blue cubes and five red cubes.
F: A spinner with four equal parts numbered 1–4 will land on the 4 on the next spin.
G:  Tomorrow the temperature outside will be −250 degrees. A B
P(B) = 1 C
P(C) =
1 2
P(D) = D E
P(E) =
1 2
P(F) =
1 4 F G
P(G) =

11. P(E)= number of “favorable” outcomes number of possible outcomes
Probability is a measure of how likely it is that an event will happen. A probability is indicated by a number between 0 and 1. Some events are certain to happen, while others are impossible. In most cases, the probability of an event happening is somewhere between certain and impossible.
1 2 1
number of “favorable” outcomes
P(E)=
number of possible outcomes

12. 1 2 1 3
1 2
0.5
P( ) =
even # = 6 1
P( ) =
0.1 6
Roll 4 6 2
1 3
P( ) =
Roll # greater than 4 =
0. 3 6

14. What would a spinner look like where the probability of spinning a green is 1.

15. What would a spinner look like where the probability of spinning a green is 0.

16. What would a spinner look like where it is equally likely to land on red and green parts.