Ch. 9 - Probability Test Review

1

• A

• B

• C

• D

Experimental Probability is:

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

Experimental probability is: number of times the event occurs/total number of trials 

• True
• False

Theoretical Probability is?

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

Theoretical Probability is: number of outcomes favorable to that event/number of possible outcomes 

• False
• True

A dice (numbered 1-6) is rolled 20 times.  How many times will a number less than 4 show?

• 5
• 10
• 15
• Never

If I flip a coin 10 times how many times should I get heads?

• 1
• 10
• 3
• 5

Experimental probability is...

• the probability of a certain event occuring
• the total outcomes of an event
• the probability based on the results of a series of trials
• the probability of how likely an event might occur

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

A compound event is..

• an event that directly causes another
• the probability of all the outcomes
• 1 event that creates 2 results
• when 2 or independent more events work together