7th Grade STAAR Review Day 4 - Probability

7th Grade Math STAAR

Probability

TEKS 7.6H I make qualitative and quantitative predictions

Determine experimental and theoretical probabilities

TEKS 7.6 A-E

Use lists and tree diagrams for events

Make predictions

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

Unlikely

Certain

Likely

As likely as not

Impossible

Probability of Simple Events​

​

​

​Part (want).

Total (have)

***Always reduce/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?

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

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? (Select all that apply)

• 2/10

• 1/5

• 2/8

• 1/2

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 on a six-sided number cube?

• 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

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

Math Response

A car dealership has various combinations of vehicles in their car lot, all of which have equally likely chance of being selected. Use the list of options below to determine the probability of each vehicle being selected.

What is the probability of selecting an SUV with a Blue Exterior?

Type answer here

Correct Answer: \frac{1}{12}

Deg^°

Rad

Math Response

Type answer here

Correct Answer: \frac{5}{36}

Deg^°

Rad

Math Response

A car dealership has various combinations of vehicles in their car lot, all of which have equally likely chance of being selected. Use the list of options below to determine the probability of each vehicle being selected.

What is the probability of selecting a truck that is black or blue with leather interior?

Type answer here

Correct Answer: \frac{1}{12}

Deg^°

Rad