Lesson 30 and 31: Probability

Draw

Draw me a picture of a DOG

You have 45 seconds!!!

Multiple Choice

How likely is it that I will see a dinosaur tomorrow?

• Certain

• Likely

• Unlikely

• Impossible

• Equally Likely

Multiple Choice

How likely is it that summer will come?

• Certain

• Likely

• Unlikely

• Impossible

• Equally likely

Probability Scale

• 0% = Impossible to happen

• 25% = Unlikely

• 50% = Even Change

• 75% = Likely

• 100% = Certain

Drag and Drop

The probability scale falls between ​

Placeholder

at lowest end and ​

Placeholder

​ at highest end

OR 0% and ​

Placeholder

percent

Drag these tiles and drop them in the correct blank above

0

1

100

50

26

1/2

5000

1000

8.2

Match

Match each event with its likelihood

• impossible

• Unlikely

• As likely as not

• Likely

• Certain

A pig flying.

Picking a face card from a deck of cards.

Getting heads on a coin toss.

A sum greater than 4 when rolling 2 dice.

Rolling a number less than 7 on a die.

• A pig flying.

• Picking a face card from a deck of cards.

• Getting heads on a coin toss.

• A sum greater than 4 when rolling 2 dice.

• Rolling a number less than 7 on a die.

Labelling

Place each word on the probability scale

Drag labels to their correct position on the image

As likely as not

Likely

Impossible

Unlikely

Certain

Probability of Simple Events​

​

​

​Favorable outcome (want)

Total outcomes (have)

Always simplify

​

For example...

IF I toss a quarter, what is the probability that I will get heads? This is really asking what is the chance that I will land on heads?

P(heads)

What is the probability?

When you toss a coin, the chance that it will land on heads is 1 out of 2. This is because there is 1 side that is heads and there are two total options.

Different ways to write probability

You could say that there is a 1/2 chance or 1 out of 2 chance or 50% chance.

P(heads) = 1/2 or 50%

Probability of the Spinner

• Look at the spinner at your right.

• How many possible outcomes are there?

Multiple Select

What is the probability of the spinner landing on blue?

• 2/10

• 1/5

• 2/8

• 1/2

Draw

BREAK TIME

Draw me something

Multiple Choice

Mrs. Trevino has 3 red pens, 5 pink pens, and 8 blue pens. What is the probability that she will choose a blue pen to grade papers?

• 1/2

• 8

• 3/16

• 16/8

Multiple Choice

A bag contains 15 yellow cubes, 6 blue cubes, and 4 red cubes. If you select a cube at random, what is the probability the cube will NOT be yellow?

• 25/15

• 2/5

• 15

• 5/3

How do you know if it is a complement problem?

• When it says: Not [event]

• Ex: What is the probability of Not rolling a number greater than 4?

• Ex: P(Not greater than 4)

Multiple Choice

What is the probability of Not spinning blue?

• P(Not Blue) = 1/4

• P(Not Blue) = 1/2

• P(Not Blue) = 2/3

• P(Not Blue) = 3/4

Multiple Choice

What is the probability of NOT rolling a Prime Number?

(Prime Numbers on a die: 2, 3, 5)

• 0/6

• 1/6

• 1/2

• 1/3

Theoretical vs Experimental Probability

Multiple Choice

Theoretical Probability is:

• What will happen

• What should happen

• What I want to happen

• What does happen

Theoretical Probability

Experimental Probability

Multiple Choice

Experimental Probability is:

• What will happen

• What should happen

• What I think happens

• What does happen

Multiple Choice

inThe bar graph shows the results of spinning the spinner 200 times. What is the experimental probability of landing on a 3?