Probability and Tree Diagrams

Lucy has the spinner pictured and spins it twice in a row. What is the probability that she lands on blue first and then on green?

• 1 / 16

• 1 ⁄ 6

• 1 ⁄ 8

• 3 ⁄ 4

What is the probability that you will get plain crust with ham on your pizza?

• 1/8

• 1/₂

• 1/₁₀

• 2/₁₀

If you spin two times, what is the probability of landing on green both times?

How do you find compound probability?

• Multiply your probabilities

• Add your probabilities

• Divide your probabilities

• Subtract your probabilities

What is the probability of rolling an EVEN number on a die and then landing on HEADS on a coin?

• 1/2

• 3/6

• 3/12

• 3 and 1

Draw a tree diagram to represent the situation. 7th graders are choosing one boy and one girl to represent them in student council. The boy representatives to choose from are Wyatt, Diego, and Stayve. The girl representatives to choose from are Ezabella, Harper, and Madalyn.

If the spinner is spun 80 times, how often can you expect it to land on the yellow shaded section?

• 15 times

• 20 times

• 25 times

• 30 times

What is the probability of landing on red when spinning the spinner once? Put your answer in a decimal form (Example: .33)

Match the following probability events

• 3/4 (Likely, 75%)

• P(1,2,or 3) of a spinner that is labeled from numbers 1 through 4

• 1/2 (50/50)

• Probability of your teacher giving a pop test

• 0% (Impossible)

• P(heads or tails) when flipping a coin once

• Unlikely (25%)

• Probability of flipping a coin once and getting heads

• 100% (2/2, Certain)

• Probability of winning the lottery every time you play

Aspen has a bag of marbles containing 6 red marbles, 4 blue marbles, 2 yellow marbles, and three green marbles. There are ​ (a)   total marbles in the bag. Aspen wants to pull out a yellow marble and she says the probability of that is ​ (b)  

• 15

• 2/15

• 10

• 14

• 12

• 13

• 2/10

• 3/15

• 1/5