Probability Simple Event and Complement

Is the spinner more likely or less likely to land
on green than yellow?

• more likely

• less likely

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

• more likely

• less likely

Which event or complement has a probability of ¼?

• P(yellow)

• P(NOT blue or orange)

• P(yellow or green)

• P(NOT green)

P(not A) = 
*Remember to simplify.*

• 6/8

• 3/4

• 2/8

• 1/4

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

A jar contains 2 pink, 6 red, and 4 blue marbles. If you pick one marble without looking, what is the probability that the marble you pick will be red or blue?

• 5/6

• 1/2

• 1/3

• 1/6

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

What is the probability of spinning green?

• 0

• 1/4

• 1/2

• 3/4

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