1. Lesson 12-8 Pages 646-649 Odds

2. What you will learn! 1. How to find the odds of a simple event.

3. Odds

4. What you really need to know!Odds The odds in favor of an outcome is the ratio of the number of ways the outcome can occur to the number of ways the outcome cannot occur The odds against an outcome is the ratio of the number of ways the outcome cannot occur to the number of ways the outcome can occur

6. Example 1: Find the odds of a sum greater than 5 if a pair of number cubes is rolled. 1,12,13,14,15,16,1 1,22,23,24,25,26,2 1,32,33,34,35,36,3 1,42,43,44,45,46,4 1,52,53,54,55,56,5 1,62,63,64,65,66,6

7. Example 1: There are 26 rolls that are greater that 5. 1,12,13,14,15,16,1 1,22,23,24,25,26,2 1,32,33,34,35,36,3 1,42,43,44,45,46,4 1,52,53,54,55,56,5 1,62,63,64,65,66,6

8. Example 1: There are 10 rolls that are 5 or less. 1,12,13,14,15,16,1 1,22,23,24,25,26,2 1,32,33,34,35,36,3 1,42,43,44,45,46,4 1,52,53,54,55,56,5 1,62,63,64,65,66,6

9. Example 1: 26:10 which means 13:5 1,12,13,14,15,16,1 1,22,23,24,25,26,2 1,32,33,34,35,36,3 1,42,43,44,45,46,4 1,52,53,54,55,56,5 1,62,63,64,65,66,6

10. Example 1b: A bag contains 5 yellow marbles, 3 white marbles, and 1 black marble. What are the odds against drawing a white marble from the bag? There are 6 marbles that are not white. 6 : 3 which means 2 : 1

11. Example 2: After 2 weeks, 8 out of 20 sunflower seeds that Tamara planted had spouted. Based on these results, what are the odds that a sunflower seed will sprout under the same conditions. ABCD 2 to 5 5 to 2 2 to 3 3 to 2

12. Page 648 Guided Practice #’s 4-8

14. Pages 646-647 with someone at home and study examples! Read:

15. Homework: Pages 648-649 #’s 9-20, 24, 33-43 Lesson Check 12-8

16. 12. not red or green

19. Page 755 Lesson 12-8

21. 1,12,13,14,15,16,1 1,22,23,24,25,26,2 1,32,33,34,35,36,3 1,42,43,44,45,46,4 1,52,53,54,55,56,5 1,62,63,64,65,66,6 The possible outcomes of two number cubes!

22. 234567 345678 456789 5678910 67891011 789101112 The sums of the outcomes!

23. Even and Odd Sums 234567 345678 456789 5678910 67891011 789101112

24. Multiples of 4 234567 345678 456789 5678910 67891011 789101112

25. 234567 345678 456789 5678910 67891011 789101112 A sum of less than 2

26. 234567 345678 456789 5678910 67891011 789101112 A sum that is a prime

27. 234567 345678 456789 5678910 67891011 789101112 A sum that is composite

28. 234567 345678 456789 5678910 67891011 789101112 A sum not 8

29. 234567 345678 456789 5678910 67891011 789101112 A sum not 9 or 10

30. 1,12,13,14,15,16,1 1,22,23,24,25,26,2 1,32,33,34,35,36,3 1,42,43,44,45,46,4 1,52,53,54,55,56,5 1,62,63,64,65,66,6 The possible outcomes of two number cubes!

31. 234567 345678 456789 5678910 67891011 789101112 The sums of the outcomes!

32. 234567 345678 456789 5678910 67891011 789101112

33. 3456012-4-3-278910

34. 3456012-4-3-278910

35. 1234-3-20-6-5-45678