Probability Flashcards
1
Q
When are two events mutually exclusive?
A
only when P(A∩B) = 0
2
Q
When two events are mutually exclusive, what is P(A∪B)?
A
P(A∪B) = P(A) + P(B)
3
Q
What is P(A∪B)?
A
P(A∪B) = P(A) + P(B) - P(A∩B)
4
Q
What is the probability of A given B?
A
P(A∩B)
P(A|B) = ————–, if independent, then P(A|B) = P(A)
P(B)
5
Q
If two events are independent of eachother, what is P(A∩B)?
A
P(A∩B) = P(A) * P(B)
