Likelihoods
A fair coin is flipped and the result is heads
as likely as not
A spinner has three equal sections labeled A, B, and C. If you spin it once, what is the probability that it lands on B?
1/3
What goes in the numerator and the denominator of the ratio for experimental probability
number of times the event occurs/total number of trials
Probability
How likely an event is to occur
A bag containing 5 red marbles and 3 blue marbles has one marble randomly selected and the result is a blue marble
Likely
A fair six-sided number cube is rolled. What is the probability of rolling a prime number?
4/6
What is the complement of rolling an even number on a fair six-sided die
rolling an odd number
Sample Space
all possible outcomes of an experiment
A song is played randomly from an album with 12 tracks, and the result is that it is the seventh track
Unlikely
A card is drawn from a standard deck of 52 playing cards. What is the probability that it is a King OR a Queen?
2/13
Jordan performed an experiment using a number cube. He rolled a number cube 50 times. He found that he rolled 6 a total of 8 times. What is the experimental probability that he did not roll a 6?
21/25
Event
An outcome or set of outcomes of an experiment or situation
You roll 2 standard number cubes, and the result is a sum of 13
Impossible
2 standard dice are rolled; what is the probability that the sum will be a 3
1/18
A sample of 100 people found that 45 have blue eyes, 30 have brown eyes, 15 have green eyes, and 10 have Hazel colored eyes. If one person from this sample is chosen at random, what is the probability that they have green or blue eyes.
3/5
Simulation
a model of an experiment, often one that would be too difficult or too time-consuming to actually perform
12 Middle school students are selected to complete a survey. None of the students are in tenth grade.
Certain
2 standard dice are rolled; what is the probability that the sum will be a number greater than 3
11/12
What is the complement of drawing a heart from a standard deck of 52 playing cards?
Drawing a card that is diamond, club, or spade
Complement
the set of all outcomes that are not the event