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Lesson 9-2 Pages 374-377

Lesson 9-2 Pages 374-377. Tree Diagrams. Lesson Check 9-1. What you will learn!. How to use tree diagrams to count outcomes and find probabilities. Vocabulary. What you really need to know!.

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Lesson 9-2 Pages 374-377

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  1. Lesson 9-2 Pages 374-377 Tree Diagrams Lesson Check 9-1

  2. What you will learn! How to use tree diagrams to count outcomes and find probabilities.

  3. Vocabulary

  4. What you really need to know! A game in which players of equal skill have an equal chance of winning is a fair game. A tree diagramis used to show all of the possible outcomes, or sample space, in a probability experiment.

  5. Link to Pre-Made Lesson

  6. Example 1: Tom flips two coins. Draw a tree diagram to show the sample space of how the coins can land. Then determine the probability of flipping two tails.

  7. H HH H T HT H TH T T TT

  8. The probability of flipping two tails is:

  9. Example 1: Method 2 Choices x Choices = Number of outcomes 2 x 2 = 4 possibilities

  10. Example 2: An ice cream sundae at the Ice Cream Shoppe is made from one flavor of ice cream and one topping. For ice cream flavors, you can choose from chocolate, vanilla, and strawberry.

  11. Example 2: For toppings you can have hot fudge, butterscotch, or marshmallow. Find the number of different sundaes that are possible.

  12. CF F C B CB M CM F VF B V VB M VM F SF S B SB SM M 9 possibilities!

  13. Example 2: Method 2 Choices x Choices = Number of outcomes 3 x 3 = 9 possibilities

  14. Example 3: If you are given a sundae at random from the shop in the previous problem, what is the probability that it has vanilla ice cream?

  15. CF F C B CB M CM F VF B V VB M VM F SF S B SB SM M 9 possibilities!

  16. Example 3: If you are given a sundae at random from the shop in the previous problem, what is the probability that it has vanilla ice cream?

  17. Page 376 Guided Practice #’s 3-6

  18. Read: Pages 374-375 with someone at home and study examples!

  19. Homework: Page 376-377 #’s 7-19 all #’s 23-33 Lesson Check 9-2 THQ 9-1/9-2 Tree Diagrams

  20. Page 585 Lesson 9-2

  21. Lesson Check 9-2

  22. Example 1: A family has two children. Draw a tree diagram to show the sample space of the children’s genders. Then determine the probability of the family having two girls.

  23. B BB B G BG B GB G G GG

  24. The probability of having two girls is:

  25. THQ 9-1 to 9-2 Tree Diagrams

  26. # 4

  27. # 5

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