The likelihood that a certain event will occur.
Probability
What is the probability of rolling a die and getting a 3?
1/6
What is the probability of rolling a die and flipping a coin and getting a 3 and a heads?
1/12
Conditional probability means the probability of event B happening, given that event A ________________________ .
Already happened/occured
In probability, OR means to __________ and AND means to ________________.
ADD; MULTIPLY
Sample Space
7/12
A coin is tossed, then a day of the
week is selected. What is the
probability of getting tails then a
day starting with the letter S?
2/14=1/7
What is the probability of drawing an ace from a standard deck of cards given that the card is red?
2/26=1/13
If I have a bag of skittles, I pick one and EAT it, then pick another one. This would be an example of events WITHOUT _____________________ .
Replacement
The likelihood of one single event occurring.
Simple Event/Probability
What is the probability that you pull a 5 or a 7 from a deck of 52 cards?
8/52=2/13
What is the probability that the spinner below lands on an even and I flip a coin and it lands on heads?
3/12=1/4
The venn diagram below shows certain college students who are enrolled in a math (M) or science (S) class this semester.
Find the probability of randomly selecting a student who is in a science class, given that they are NOT in a math class.

78/103
The probability that an event happens is given below:
a) what is the probability that the event does NOT happen?
b) the prob that something does NOT happen is called the ________________ ?
5/8
Complement
3/8
Likelihood of two or more events occurring at the same time.
Compound Events/Probability
What is the probability that the spinner lands on a factor of 6?

4/8=1/2
A bag contains 25 red chips, 18 blue chips, and 29 yellow chips. A chip is selected, replaced, and then another chip is chosen. Find the probability of choosing a yellow and a blue.
29/72*18/72=29/288
What is the probability of randomly choosing someone who drives an SUV, given that they are female?
135/180=3/4
What is the probability of flipping a coin and getting heads, rolling a dice and getting an odd number, and spinning the spinner and getting a 3?
1/2*3/6*1/6=1/24
The probability that certain event happens, given that a separate event has already happened.
Conditional Probability
What is the probability of the spinner landing on an odd number or primary color?
4/6=2/3
A bookshelf contains:
9 mysteries, 7 biographies, and 4 science fiction books.
Find the probability of selecting a biography, NOT replacing it, and then selecting a mystery.
7/20*9/19=63/380
Carter is handing out Valentine's Day cards to his friends. He has:
8 Batman cards, 12 Superman cards, and 5 Captain America cards.
What is the probability that the first two he gives out (not replaced) are Batman, given that they are both from the DC universe?
8/20*7/19=14/95
A box of pizza contains:
3 cheese slices, 7 pepperoni slices, and 5 supreme slices.
Mark eats a random slice, then grabs another. What is the probability that he chooses pepperoni the first time and the second time?
7/15*6/14=1/5