Probability Flashcards
(11 cards)
1
Q
How would you indicate the probability of event A happening?
A
P(A)
2
Q
How would you denote the probability of A not happening?
A
P(A’) - the complement
3
Q
What does P(AUB) mean?
A
Probably of A OR B happening (union)
4
Q
What does P(AnB) mean?
A
Probability of A AND B happening (intersect)
5
Q
What is the addition rule for probability?
A
P(AUB) = P(A) + P(B) - P(AnB)
6
Q
What is conditional probability?
A
The likelihood of an event happening GIVEN that another event has already occurred
7
Q
What is the formula for conditional probability?
A
P(A|B) = P(AnB)/P(B)
8
Q
What is the multiplicative law of probability? (Rearrange conditional formula)
A
P(B)×P(A|B)=P(AnB)
9
Q
What are mutually exclusive events?
A
Two events that cannot happen at the same time
10
Q
How to test for independent events?
A
P(AnB)=P(A)×P(B)
11
Q
A
