Lesson 9: Calculating Probability of Compound Events

Lesson 9: Calculating Probability of Compound Events

What do you know so far?

Quiz first!

Multiple Choice

If you roll a numbered cube, what is the probability of
getting an even number?

• 1/4
• 1/3
• 1/5
• 1/2

Multiple Choice

If Jack has 4 different colored shorts and 5 different shirts, how many combinations of a shirt and shorts can he make?

• 9

• 5

• 10
• 20

Multiple Choice

In a game you will spin the spinner pictured and roll the
die.

Which of these is NOT an appropriate method for
finding the total number of outcomes?

• Add the number of sections on the spinner to the number of sides of the die.

• Multiply the number of sections on the spinner to the number of sides of the die.

• Make a tree diagram and a sample space.

• Create an organized list of all the possible combinations

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Poll

If you spin the spinner and roll the cube, how many
outcomes are there?

• 6

• 11

• 25

• 30

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Lesson: Compound Events (2)

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Poll

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Poll

P (yellow, then 6)

• 1/9

• 1/11

• 2/6

• 1/30

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Poll

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Poll

P (even, even)

• 2/9

• 1/5

• 5/6

• 2/30

Lesson: Compound Events (2)

18/32

Lesson: Compound Events (2)

19/32

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​Break it up into two events:
P(spinner landing on 4) = P(die landing on odd) =

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​Find the probability of each:
P(4) = 1/5 P(odd) = 1/2

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​Multiply the probabilities

Quiz

Compound Events Quiz

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Multiple Choice

A coin and a number cube with the numbers 1 through 6 are tossed. What is the probability of the coin showing tails and the number cube showing the number 3?  P(tails, 3) =

• 1/12
• 1/4
• 1/8
• 1/2

Multiple Choice

Probability of:

spinning a 3, then drawing an A

P(3, A) =

• 2/8

• 1/4

• 1/16

• 1/8

Multiple Choice

You pick a marble out of the bag, then put it back and pick again.

P(blue, blue) =

Choose the correct expression

• $$\frac{3}{7}\times\frac{3}{7}$$  

• $$\frac{4}{7}\times\frac{4}{7}$$  

• $$\frac{4}{7}\times\frac{3}{6}$$  

• $$\frac{4}{7}\times\frac{3}{7}$$