Basic Probability

The probability of it raining today is 30%.  What is the probability that it will NOT rain?

• 30%

• 70%

• 100%

• 0%

What is the probability that you choose blue? *simplify

• 8/26

• 4/13

• 8/25

• 1/3

What is the probability of spinning a 2 on the spinner?

• 1/2

• 1/3

• 1/8

• 1/4

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

Amelia receives a treat bag. The treat bag contains 10 gumballs, 5 pixie sticks, 2 bracelets, and 3 chocolates. If Amelia selects 3 items from her treat bag without looking and gives them to her sister, which could NOT represent a possible outcome for the items Amelia selects?

• gumball, gumball, gumball

• pixie stick, gumball, chocolate

• bracelet, bracelet, bracelet

• gumball, gumball, pixie stick

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

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

• impossible

• unlikely

• equally likely

• likely

A bag contains 30 pieces of candy. There are 15 grape, 7 cherry, 3 lemon, 5 strawberry. What is the probability of drawing a lemon?

• 3

• 1/10

• 3/10

• 30%

A set of all possible outcomes is known as - 

• a list

• a complement

• a sample space

• an event

What is the probability of selecting an orange candy?

• 0%

• 25%

• 50%

• 100%