If you flip a coin 10 times, how many times do you expect to get heads?
5
What is the probability of rolling snake eyes?
(two one's)
1/36
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
Given a 4 color spinner with equal parts (red, blue, yellow, green) what is the probability of spinning red?
1/4
If you roll a die 24 times, how many times do you expect to get a 4?
4
P(sum of 3)= ?
1/16
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
Given a 4 color spinner with equal parts (red, blue, yellow, green) what is the probability of spinning purple?
0
How many times would you expect to get red if you spun the spinner on the anchor chart 40 times?
Probability of rolling the doubles (same number) on both dice?
1/6
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
You have a bag of marbles, four red and five green. What is the probability of choosing red?
(4/9)
How many times would you expect to get two even numbers if you rolled two dice, 40 times?
10
What is the probability of rolling a six then a number less than 3?
1/18
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
Given a 4 color spinner with equal parts (red, blue, yellow, green) what is the probability of spinning red then blue? (HINT: Think of ALL of the possible combinations, that will be your denominator)
1/16
Spinner 1 Spinner 2
Blue + Red, yellow, blue, green
Green + Red, yellow, blue, green
Yellow + Red, yellow, blue, green
Red + Red, yellow, blue, green
P(not a sum of 12)= ?
35/36
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
What is the theoretical probability of rolling a one THEN picking a red card out of a deck of cards
1/6 * 1/2 (half of cards are red so 1/2) = 1/12