Basic Probability and Counting

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

You give the answer to a probability problem as 6/5. The teacher marks it wrong. Why?

• It should have been 5/6.

• Its not written as a percent.

• Its more than 1.

• Its not written as a decimal.

Which of these cannot be considered a probability of an outcome?

• 1/3

• -1/5

• 0.80

• 112%

• 1

Roll a die one time. Find P(a number greater than 3 or odd).

• 0

• 1/2

• 5/6

• 1/6

A probability near 1 is _______.

• never going to happen 

• very likely to happen

• probably never going to happen

•  equally likely to happen

P(not A) = 
*Remember to simplify.*

• 6/8

• 3/4

• 2/8

• 1/4

Two events are mutually exclusive if:

• they cannot happen at the same time

• they can happen at the same time

• they always happen 

• they never happen 

At  a New Car Dealership a particular model comes in 4 trim levels, 5 different colors, and 3 different interiors. How many different versions of this car model can be created from these options?

• 180

• 23

• 12

• 60

A bag has 3 red marbles, 2 blue and 4 yellow. What is the theoretical probability of pulling a red?

• 3/10

• 3/9

• 1/9

• 1/3

What is the probability that you choose blue? *simplify

• 8/26

• 4/13

• 8/25

• 1/3