Y1, C5 - Probability Flashcards
1
Q
What is an experiment
A
A repeatable process that gives rise to a number of outcomes
2
Q
What is an event
A
A set of one or more of the outcomes in a experiment
3
Q
What is a sample space (probability)
A
A set of all possible outcomes
4
Q
What does A U B mean
A
A OR B
Union
5
Q
What does A n B mean
A
A AND B
Intersection
6
Q
What does A’ mean
A
NOT A
Complement of A
7
Q
What do mutually exclusive events mean
A
They can’t happen at the same time
8
Q
Formulas for mutually exclusive events
A
A n B = 0
A u B = A + B
9
Q
What are independent events
A
Events where the probability of one happening isn’t affected by the other
10
Q
Independent event formula
A
A n B = A * B
11
Q
A
