Probability with proportions

Isidro flips a fair coin 40 times. How many times can he expect heads to appear?

• 4
• 10
• 15
• 20

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

Suppose there are 200 students in the cafeteria during lunch. How many students would you expect to choose pizza as their favorite cafeteria food? Hint: These 200 students are a prediction.

• 90

• 104

• 18

• 72

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

The table shows the political party affiliations for a medium-sized neighborhood with 94 adults. If the

neighborhood is representative of a town with an adult population of 9000, approximately how many of them are

likely to be Independents?

• 1150

• 1500

• 2800

• 4000

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.3

CCSS.7.SP.A.1

CCSS.7.SP.A.2

If a dice is rolled 300 times, how many times would you predict a roll of a 1 or a 6?

• 50
• 100
• 150
• 75

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.6

CCSS.7.SP.C.7

If you spin the spinner 90 times, how many times should the number 3 be selected?

• 9
• 15
• 16
• 30

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

On Marnie’s street, 12 of the 20 houses put up holiday decorations. Based on this information, how many houses out of the 160 in Marnie’s neighborhood will likely put up holiday decorations?

• 12

• 20

• 80

• 96

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.3

CCSS.7.SP.A.1

CCSS.7.SP.A.2

One hundred people who attended a recent concert were classified by age bracket (see the chart).

If 2700 people attended the concert, what would be a good prediction for the number of attendees between 16 and 18 years old?

• 1215

• 995

• 875

• 625

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.3

CCSS.7.SP.A.1

CCSS.7.SP.A.2

One hundred people who attended a recent concert were classified by age bracket (see the chart).

If 2500 people attended the concert, what would be a good prediction for the number of attendees between 13 and 15 years old?

• 675

• 725

• 800

• 925

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.3

CCSS.7.SP.A.1

CCSS.7.SP.A.2