1. What is the probability you got an A given you studied? What is the probability you get into an accident given you have insurance?

2. P (B | A ) = P ( A & B) P ( A ) 12.2 Conditional Probability P ( B | A ) = Probabilty of B, given A.

13. Shampoo is better. I clean the hair! a) P (applies shampoo directly | female) b) P( into hand) c) P (into hand | male) d) P ( male | into hand )

14. Making a tree diagram of all snowfalls in Buffalo, 5% are heavy.

15. After a heavy snowfall, schools are closed 67% of the time.

16. After a light snowfall, schools are closed 3% of the time.

17. First branch simple probability. Second branch conditional. P( O | H ) = 0.33 P( Light and Open).95 * 0.97 = 0.92 AND = Multiplication

18. First branch simple probability. Second branch conditional. P( O | H ) = 0.33 P( Light and Open).95 * 0.97 = 0.92 AND = Multiplication

19. Pg. 657 Look at # 12

20. Problems to do: pg. 656 #1-13 all pg. 659 #1-11 all