Grings - Probabilidade aula 11

How to calculate the probability of A AND B occurring: P(A ∩ B) = P(A).P(B) Subscribe to my CHANNEL to receive FREE classes SITE: http://www.omatematico.com/ DVD classes: http://www.lojaomatematico.com.br/ STUDYING has never been so easy! CONTENT: 2 exercises solved step by step In class 10, we saw the probability of A OR B occurring (at least 1 occurs): P(A U B) = P(A) + P(B) - P(A ∩ B) Video class: http://bit.ly/1zNaHLb at time (15:48) How to calculate the probability of A AND B occurring P(A ∩ B) = P(A) . P(B) INDEPENDENT Events P(A ∩ B) = P(A) . P(B/A) DEPENDENT Events in time (0:41) What are dependent EVENTS? in time (1:20) How do you read: P(B/A)? It is the probability of B occurring given that A has already occurred, since they are dependent events. in time (1:47) P(B/A) = P(B) independent events in time (2:25) P(B/A) ≠ P(B) dependent events in time (2:45) SUMMARY in time (3:00) Exercise 1 in time (3:28) Exercise 2 in time (12:42)