Probability Lesson 1

Probability Lesson 1

by Melissa CHAPMAN

Poll

Rate your understanding of Probability and Sample Space before starting the lesson.

• 1

• 2

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• 4

• 5

​Probability

​Is the likelihood or possibility that something will happen. Always written as a fraction or a percentage.

Multiple Choice

The chance of an event happening is called... 

• Event
• Result
• Outcome
• Probability

Multiple Choice

How do you write 0.02 as a percent?

• 20%
• 200%
• 2%
• .02%

Multiple Choice

What is the probability of rolling 15 with a pair of dice?

• impossible
• unlikely
• equally likely
• likely

​Sample Space

A sample space is the set of all possible outcomes in the experiment. It is usually denoted by the letter S. Sample space can be written using the set notation, { }.

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​Experiment 1: Tossing a coin

Possible outcomes are head or tail.

Sample space, S = {head, tail}

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Experiment 2: Tossing a die

Possible outcomes are the numbers 1, 2, 3, 4, 5, and 6

Sample space, S = {1, 2, 3, 4, 5, 6}

Multiple Choice

The set of all the possible outcomes is called:

• Result
• Sample Space
• Probability
• Event

Multiple Choice

What is the sample space?

• 6 bears

• orange, green, red, white, yellow

• unlikely

• 2 red bears

Multiple Choice

What is the sample space for flipping a coin?

•  {Head, Tails}

•  {Head, Head}

•  {Tails, Tails}

• {1, 2, 3, 4, 5, 6}

Multiple Choice

What is the sample space when rolling a regular number cube?

• 1

• 2, 4, 6

• 1, 2, 3, 4, 5, 6

• 6

Multiple Choice

What is the sample space for this jar of marbles?

• red

• red, yellow, green, blue

• red and yellow

• red and green

Multiple Choice

Which shows the sample space for flipping two coins?

• H, T
• HH, HT, TH, TT
• HH, TT
• Dime, Nickel

Multiple Choice

How many total outfit options are represented?

• 12
• 22
• 3

Multiple Choice

How many outcomes are there with tossing a coin and rolling a dice?

• 2
• 6
• 12
• 24

Multiple Choice

How many outcomes when choosing a vowel (a, e, i, o, u) and then a number (2 or 6)?

• 7
• 5
• 10
• 12

Poll

Rate your understanding of Probability and Sample Space after the lesson.

• 1

• 2

• 3

• 4

• 5