10/30 Lesson 5.2.5 Probability Trees

1.  Warm-up:  Using the Probability Tree from the Crazy Creations Ice Cream store, answer the following questions:

a)  What is P(chocolate and sprinkles)?

b)  What is P(vanilla and grape)?

c)  What is P(hazelnuts, chocolate, and plum)?

d)  What is P(toffee bits and sprinkles)?


2.  Announcements:

• We will finish Unit 3 on Tuesday
• Team Test on Wednesday

3.  Finish Lesson 5.2.5 Probability Trees

• Notes/discussion:  Mutually exclusive events
• Do Problems 68 and 69 in teams

4.  Probability Challenge problem (extra credit, due Monday)

Design two number cubes that meet the following requirements:

• P(sum is 9) = 1/6
• P(sum is odd) = 2/3
• P(sum is divisible by 5) = 1/18

Hints/Tips:

1. The number cubes don't need to be exactly the same
2. The number cubes don't need to go up in ascending order
3. A number can be repeated on a number cube
4. All faces of the number cube must contain positive integers