Probability Models

A certain brand of TV has a 50% chance of being defective. Which model could be used to determine the probability that when a TV is chosen, it will be defective?

• spin a spinner with 50 equal sections

• draw from a bag containing 3 red marbles and 2 green marbles

• flip a coin

• roll a die

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CCSS.7.SP.C.5

CCSS.7.SP.C.7

How could you simulate randomly choosing a place for lunch out of 6 different restaurants?

• flip a coin
• roll a die
• spin a 4-sided spinner
• flip 2 coins

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.8

CCSS.7.SP.C.7

Which is the best way to simulate choosing one student out of 12 to be the class president?

• Draw from a bag with 12 blue marbles

• roll a die twice

• spin a spinner with 12 sections

• flip a coin 6 times

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.A.1

A sports bag contains 3 tennis balls, 4 baseballs, and 8 golf balls. Each is equally likely to be chosen. Which of the following models could be used to simulate this situation?

• flipping a coin fifteen times

• spinning a spinner with three equal sections

• choosing from 3 red marbles, 4 yellow marbles, and 8 blue marbles

• rolling a number cube fifteen times

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.8

CCSS.7.SP.C.7

CCSS.7.SP.A.1

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An ice cream parlor offers 15 different flavors of ice cream. Which model could be used to show how many different choices there are?

• spin a spinner with 5 sections
• flip a coin
• spin a spinner with 15 sections
• roll a die and flip a coin

A store is handing out coupons worth 10%, 15%, 20%, or 25% off. Each coupon is equally likely to be handed out. Which of the following models could be used to simulate this situation?

• flipping a coin four times

• spinning a spinner with four equal sections

• rolling a number cube one time

• rolling a number cube four times

Tags

CCSS.7.SP.C.8

CCSS.7.SP.C.7

A test has 5 multiple-choice questions and each question has 2 possible answers (A or B). Which simulation would you use?

• Draw from a bag containing 5 red and 2 yellow blocks

• Spin a spinner with 5 parts, 2 times

• Flip a coin 5 times

• Roll a die 5 times

Tags

CCSS.7.SP.C.8

The questions on a multiple choice test each have 6 answer choices. Which model can be used to simulate randomly selecting the correct answer on a 20 question multiple choice test?

• rolling a six-sided number cube 6 times
• rolling a six-sided number cube 20 times
• spinning a spinner with 4 equal sized sections 6 times

• choosing 6 marbles in a bag of 20 different colored marbles

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.8

CCSS.7.SP.C.7

Which is the best way to represent answering 25 multiple-choice questions with 4 choices for each answer?

• spin a spinner with four sections 25 times
• roll a die 25 times
• flip a coin 25 times
• Draw 4 marbles from a bag containing 25 different colored marbles

Tags

CCSS.7.SP.C.8

 A group of students working together on a project want to randomly choose who has to complete each of the 15 activities for the project. If there are 6 students in the group, describe a model that they could use to simulate choosing who should complete each activity. 

• rolling a number cube 15 times

• spinning a spinner with 15 sections 6 times

• flipping a coin 15 times

• Drawing 6 marbles from a bag containing 15 black marbles

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.8

CCSS.7.SP.A.1

CCSS.7.SP.A.2