Using Probability to Predict Future Events

If I spin 35 times, how many times should the color yellow show up?

• 1
• 5
• 7
• 10

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.6

CCSS.7.SP.C.7

In a random survey of 50 students at Great Middle School, 32 said chocolate was their favorite flavor of yogurt. The school has 450 students. How many of them are likely to select chocolate as their favorite flavor? 

• 144
• 162
• 225
• 288

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.3

CCSS.7.SP.A.1

CCSS.7.SP.A.2

The sections of spinner below are shaded red, blue, or green. Out of 24 spins, how many times will the spinner land on blue or green? 

• 16
• 20
• 12
• 6

The grocery store will ask another group of 25 dentists each to recommend a toothpaste brand. Based on the information in the table, what is the most reasonable prediction of the number of dentists in this group who will recommend Brand T?

• 3
• 2
• 9
• 4

A principal randomly chose 40 students from grade 5. Of these students, 9 were wearing watches. Based on this information, what is the most reasonable prediction of the number of students wearing watches in a group of 120 students from grade 5?

• 27
• 9
• 18
• 80

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.3

CCSS.7.SP.A.1

CCSS.7.SP.A.2

Jillian rolled a number cube 360 times. About how many times do you expect her to roll a 2?

• 20 
• 180
• 60 
• 120

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.6

CCSS.7.SP.C.7

These 12 shapes are put into a bag.  If you reach into the bag 60 times, replacing the shape after each time, predict how many times you would pull out a circle.

• 15 times
• 20 times
• 25 times
• 30 times

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

CCSS.7.SP.C.5

CCSS.7.SP.C.6

CCSS.7.SP.C.7

100 second graders were asked to do a book report about one of these four zoo animals.  The number of students who chose each animal is shown in the table.  If 250 second graders had to choose of of the four animals, predict how many would choose to write about a giraffe.

• 60 students
• 50 students
• 40 students
• 30 students

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.3

CCSS.7.SP.A.1

CCSS.7.SP.A.2

The Student Council asked every tenth student in the lunch line how they preferred to be contacted with school news. The results are shown in the table. Is this an unbiased sample? If yes, suppose there are 684 students at the school. How many can be expected to prefer E-mail?

• No, it's a biased sample

• 432

• 304

• 16

The student council conducted a survey to determine what drinks and how many of each type of drink they should purchase to stock their concession stand. The table above shows the results of their survey. If the student council will purchase a total of 600 drinks, how many of these drinks should be lemonade based on the results of the survey?

• 336

• 56

• 150

• 280