Basic and Conditional Probability

Experimental Probability is:

• What Will happen 
• What actually happens
• What should happen
• What I think Happens

Theoretical Probability is?

• What Should happen
• What does happen
• What Will Happen
• What I want to Happen

There are 3 red marbles, 4 blue marbles, 2 green marbles, and 6 clear marbles in a burlap bag. One marble is randomly pulled from the bag. What is the probability the marble was green?

• 1/2

• 1/7

• 2/15

• 2/17

What is the probability of spinning an even number?

• 16 2/3%

• 33 1/3%

• 50%

• 75%

A bag contains 5 quarters, 2 dimes, and 4 pennies. What is the probability of picking a quarter?

• 5/11
• 5/6
• 1/3
• 5

P(not A) = 

• 6/8

• 3/8

• 2/8

• 1/8

The venn diagram shows which sports are played by a class of students.

How many students are in the class?

• 20

• 25

• 30

• 35

The venn diagram shows which sports are played by a class of students.

How many students are taking tennis?

• 6

• 11

• 25

• 30

The venn diagram shows which sports are played by a class of students.

What is the probability of a student playing both tennis and soccer?

• 1/6

• 5

• 20

• 2/3

What is the probability that someone plays basketball?

• .12

• .68

• .52

• .46