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• Pick up the guided notes and calendar

• No, I do not have your tests graded!!!

There are 30 marbles in a bag. 10 are blue, 7 are

red, 6 are yellow, and 7 are purple.

1) What is the probability of getting a red marble?

2) What is the probability of getting a yellow or a blue?

3) What is the probability of getting an orange?

ProbabilityUnit 8

Vocabulary to know…

• Outcome

• Sample Space

• Event

• Probability

• Theoretical Probability

• Complement

• Odds

• Favorable Outcome

• Experimental

Probability

• Union

• Intersection

• Experiment

• Survey

Theoretical vs.

Experimental Activity

THEORETICAL PROBABILITY

Example

Complement

If the probability of you getting an A in this class is 78%,

what is the probability that you do not get an A?

Example

Odds

Experimental Probability

Example

Example

Lesson Check

Lesson Check

The difference between….

AND

• When you are asked to

find the probability of

Event 1 AND Event 2

happening, they both

must occur.

This is called the

INTERSECTION of two

sets.

Operation: Multiplication

OR

• When you are asked to

find the probability of

Event 1 OR Event 2

happening only one, or

both could occur.

This is called the UNION of

two sets.

Operation: Addition

Notation: P ∩ Q Notation: P U Q

The difference between….

AND OR

Notation: P ∩ Q Notation: P U Q

Example• List the sample space for rolling a die!

• What about rolling two die?

• What is the probability of rolling an even number on the first AND a 2 on the second?

• What is the probability of rolling an even number on the first OR a 2 on the second?

• What is the probability of rolling a 5 on the first AND a 1 on the second?

Homework

• Worksheet

Do Now

Complete the half sheet!

Probability: Review

& Frequency

Thursday December 11th, 2014

Solutions

Solutions

Solutions

NC COMMON EXAM ?

Frequency

Example

• What is the probability of

someone having 10-13

home runs?

• What is the probability of

someone having 2-9 home

runs?

What is the probability that a student is 5ft tall?

What is the probability that a student is 6ft tall?

2 Way Frequency Table

Example

Relative Frequency

You try!

NC Common Exam

Homework

• Two-Way Frequency Table Worksheet