Probability Review (7th CCSS)

Marty can go to one movie on either Friday or Saturday. He will be able to choose either a comedy or an action movie. Which list shows all the possible outcomes of one movie on one day?

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A health study of 540 adults found that only 7 in 20 adults get enough sleep each night. Based on the results of the sample, how many adults got enough sleep?

• A. 27

• B. 35

• C. 189

• D. 202

10. There are five marbles in a bag. Three are green and two are yellow. You draw a marble, replace it, and then draw another. What is the probability of choosing two yellow marbles?

• 4/25

• 1/10

• 2/5

• 1/5

17. Michael has a set of five cards shown below. Michael will randomly select a card, not replace it, and then select another card. What is the probability that he selects a prime number and then a 1?

• 3/25

• 9/25

• 1/10

• 3/20

18. A soccer team has different colored pinnies that are worn over their practice jerseys. A team member is going to randomly select a pinnie from the bag. Which of the following statements is not true?

• A. It is likely that the pinnie will be orange.
• B. It is more likely that the pinnie will be yellow than red.
• C. It is twice as likely that the pinnie is red than orange.
• D. It is half as likely that the pinnie is orange than red.

The probability that a person in a certain town has brown eyes is 2 out of 5. A survey of 450 people from that same town was taken. How many people would be expected to have brown eyes?

• 45

• 90

• 180

• 225

Jamal, Gary, Charlie, and Brian are going to stand in a line, one behind the other. In how many different ways can they stand in the line?

• 24

• 16

• 10

• 4

The spinner spun twice.

What is the probability of spinning an odd number both times? 

• 1/8

• 1/4

• 1/2

• 3/4

Jane wants to pick out an outfit for the school dance. She can choose from 3 pairs of pants, 5 shirts, and 2 pairs of shoes. How many different outfits does Jane have to choose from?

• 10

• 15

• 30

• 60

Philip is ordering a lunch that consists of an entree and a dessert. He can get either a slice of pizza or hotdog as entree. For dessert, he can get either cookies, ice cream, and a bag of chips. How many different ways can Philip order lunch?

• 2

• 5

• 6

• 9