Simple Probability Vocabulary Review

Is it more likely or less likely to pull a red marble than a green marble?

• more likely

• less likely

A set of all possible outcomes of one or more events. Ex. {1,2,3,4,5,&6}

• Independent Events

• Outcome

• Probability

• Sample Space

Earl is asked to choose a day of a week. What is the probability of choosing a day which starts with S?

• 1/7

• 2/7

• 3/7

• 1

P(not A) = 
*Remember to simplify.*

• 6/8

• 3/4

• 2/8

• 1/4

The probability of it raining today is 30%.  What is the compliment of this event?

• 30% chance of rain

• 70% chance of no rain

• 100% rain is certain

• 0% rain is impossible

The letters that form the word ALGEBRA are placed in a bowl. What is the probability of choosing a letter other than “A”? 

• 2/7

• 5/49

• 5/7

• 10/49

Probability values are between ____________________.

• 0 and -1

• 0 and 1

• 1 and 100

• 0.5 and 1

An event with a probability of impossible would be...

• 0

• 1/2

• 2/3

• 1

An event with a probability of certain would be...

• 0

• 1/2

• 2/3

• 1

An event with a probability of equally likely as unlikely would be...

• 0

• 1/2

• 2/3

• 1