A ratio or product of the likelihood of an event(s) determined by mathematical facts known to us.
Theoretical Probability
When rolling one die...
P(3)= ?
1/6

Mr. Barker found the probability of drawing a spade to be 1/5. Did he find the theoretical or experimental probability?
Experimental Probability
What actually occurs in an experiment when you conduct an experiment(s).
Experimental Probability
When flipping 2 coins
P(both coins are heads)=
1/4

What is the theoretical probability of landing on green or blue?
1/2
All results that could occur from an experiment
All Possible Outcomes
When rolling two die...
P(rolling a 7)=
6/36 or reduced to 1/6

What is the experimental probability of landing on green or blue?
3/8
A set of one or more outcomes in a probability experiment.
An event
What is the theoretical probability of picking a purple marble?
1/11

What is the theoretical probability of not landing on green?
3/4
The results that you want to happen in an experiment
D_______ O_______
Desired Outcome

What is the probability of landing on a green?
1/4

What is the experimental probability of not landing on green?
17/20