ap stats unit 4 formula

compliment

1-P(A), the event that A doesn’t happen

mutually exclusive (def)

if they have no outcomes in common, they can’t happen together

general addition

P(A or B)= P(A)+ P(B)- P(A and B)

addition for mutually exclusive

P (A or B)= P(A) + P(B)

probability an event occurs

number of outcomes in event A/number of total outcomes

conditional probability (def)

probability of event A given event B happens

condiitional probability

P(A and B)/P(B)

independent events

P(A|B)= P(A|B^C)= P(A)

general multiplication 

P(A and B)= P(A)*P(B|A)