probability Flashcards
1
Q
when is an event mutually exclusive
A
cannot happen at the same - means they are separate and have nothing in common
P(AuB) = P(A) + P(B)
P(AnB) = 0
2
Q
formula for conditional probability
A
P(A|B) = P(AnB) / P(B)
3
Q
what is an event independent
A
P(AnB) = P(A) x P(B)
P(A|B) = P(A)
4
Q
what is conditional probability
A
the probability an event happens depending on whether another did or not
5
Q
why does P(A|B) = P(A)
A
Because the events are independent event A doesn’t depend on event B
