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

Tags

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.7

CCSS.7.SP.C.8

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.A.1

CCSS.7.SP.C.5

CCSS.7.SP.C.7

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.A.1

CCSS.7.SP.A.2

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.8

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.7

CCSS.7.SP.C.8

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.7

CCSS.7.SP.C.8

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.A.1

CCSS.7.SP.A.2

CCSS.7.SP.C.5

CCSS.7.SP.C.8