Basics of Probability

What is the probability of spinning an even number?

• 16 2/3%

• 33 1/3%

• 50%

• 75%

If you choose from the following M & M colors, what is the probability that you choose blue?

(5 green, 6 yellow, 8 blue, 7 brown)

• 8/26

• 4/13

• 8/25

• 1/3

A set of all possible outcomes is known as - 

• a list

• a complement

• a sample space

• an event

Mrs. Elder has a box containing 6 cracker, 3 peppermints, 6 bubble gums, and 3 licorice sticks. If she randomly chooses one piece from the box, what is the probability that she will grab a cracker or a peppermint?

• peppermint

• 1/6

• 1/2

• 1/3

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

• 30%

• 70%

• 100%

• 0%

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 can be written as ...

• a fraction

• a decimal

• a percent

• all of the above

What is the probability of rolling a cube and having land as an odd number?

• 3/4

• 1/3

• 1/2

• 2/5

Four chickens, two cows, and one horse are all in a barn. What is the probability that the cow WILL NOT exit the barn next?

• 1/7

• 4/7

• 2/7

• 5/7

You pick a marble from this bag.

What is the probability you will choose either a black or white marble?

• 0.6

• 0.9

• 0.1

• 0.4