Lesson 03: What Are Probabilities? | Unit 8: Probability and Sampling

Multiple Choice

List the sample space for the chance experiment of flipping a coin.

• {Tails, Tails}
• {Heads, Heads}
• {Heads, Tails}
• {Heads, Tails, Edge}

Multiple Choice

List the sample space for the chance experiment of selecting a random season of the year.

• {January, February, March}
• {day, night, twilight}
• {spring, summer, autumn, winter}
• {rainy, sunny, cloudy}

Multiple Choice

List the sample space for the chance experiment of selecting a random day of the week.

• March
• February
• ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"]
• January

Multiple Choice

A computer randomly selects a letter from the alphabet. How many different outcomes are in the sample space?

• 24
• 20
• 30
• 26

Multiple Choice

A computer randomly selects a letter from the alphabet. What is the probability the computer produces the first letter of your first name?

• 1/26
• 1/20
• 1/30
• 1/25

Multiple Choice

What is the probability of selecting a random month of the year and getting a month that starts with the letter “J”? If you get stuck, consider listing the sample space.

• 1/6
• 1/3
• 1/12
• 1/4

Open Ended

Noah will select a letter at random from the word “FLUTE.” Lin will select a letter at random from the word “CLARINET.” Which person is more likely to pick the letter “E?” Explain your reasoning.

Multiple Choice

A textbook has 428 pages numbered in order starting with 1. You flip to a random page in the book in a way that it is equally likely to stop at any of the pages. What is the sample space for this experiment?

• {1, 2, 3, ..., 428}
• {1, 2, 3, ..., 428, 429}
• {1, 2, 3, ..., 500}
• {1, 2, 3, ..., 400}

Multiple Choice

A textbook has 428 pages numbered in order starting with 1. You flip to a random page in the book in a way that it is equally likely to stop at any of the pages. What is the probability that you turn to page 45?

• 1/300
• 1/500
• 1/400
• 1/428

Multiple Choice

A textbook has 428 pages numbered in order starting with 1. You flip to a random page in the book in a way that it is equally likely to stop at any of the pages. What is the probability that you turn to an even-numbered page?

• 0.25
• 0.75
• 0.5
• 1.0