Predicting Probabilities

Which is the sample space for the results of opening a book with 428 pages to a specific page?

• All the numbers from 1 to 428

• 1/428

• 1/2

• 0.2%

What is the probability of opening a book with 428 pages in it to page 45?

• the numbers 1 to 428

• 1/428

• 1/2

• 45/428

The probability of opening a book with 428 pages to an even numbered page.

• the numbers 1 to 428

• 1/428

• 1/2

• 25

Which event is more likely, rolling a six sided number cube and getting an even number, or tossing a coin and having it land heads up?

• even number on the number cube

• heads up with a coin toss

• equally likely

• I don't know - I don't have any dice or money

A spinner has four equal sections and one letter from the word "MATH" in each section. If you spin the spinner 20 times, how many times would you expect it to land on the letter A?

• 25 times

• 1/4 times

• 5 times

• 4 times

100% probability

• certain

• likely

• unlikely

• uncertain

Something you do over and over again, and you don't know what will happen each time

• my homework

• outcomes

• chance experiment

• events

Based on the bar graph, what is the probability that a dog is a person's favorite pet?

Based on the bar graph, what is the probability that a gerbil is a person's favorite pet?

A 7th grade student surveyed 25 students at her school. She asked them how many hours a week they spend playing a sport or game outdoors. What is the probability of the students answering 3 hours?