Making Predictions Using Proportions

A store manager receives a delivery of 2 boxes of lightbulbs. Each box contains 25 light bulbs. The store manager tests all the lightbulbs and finds that 2 of them are defective. Based on these results, what can the store manager predict about the next delivery of lightbulbs?

• A delivery of 3 boxes will contain 3 more defective light bulbs than a delivery of 2 boxes.

• A delivery of 4 boxes will contain 2 more defective light bulbs than a delivery of 2 boxes.

• A delivery of 5 boxes will contain 10 more defective light bulbs than a delivery of 2 boxes

• A delivery of 6 boxes will contain 3 more defective light bulbs than a delivery of 2 boxes.

Tags

CCSS.5.OA.B.3

Felix has a bucket of golf balls. The table shows the number of golf balls of each color in the bucket. Felix selects a golf ball at random. Based on the information in the table, which statement is true?

• The golf ball is more likely to be green than all other colors combined.

• The golf ball is equally likely to be pink, white, orange, or green.

• The golf ball is 2 times as likely to be orange as it is to be pink.

• The golf ball is 7 times as likely to be green as it is to be white.

Mari bought 6 packets of tomato seeds. Each packet contained 24 seeds. She planted 1 packet of the seeds, and 15 seeds sprouted. Which statement about the seeds in the remaining packets is best supported by this information?

• No more than 50 seeds will sprout.

• Between 50 and 100 seeds will sprout.

• At least 100 but no more than 120 seeds will sprout.

• All 120 seeds will sprout.

Liz conducted a survey of the number of kids in her school who would join a charity work club if she started one. She surveyed 75 kids and 30 said they would join. If there were 165 kids in her grade, how many could she expect to join? Hint: line = line

• 23 Kids

• 46 Kids

• 66 Kids

• 132 Kids

Tags

CCSS.7.RP.A.3

Leticia has two bouquets of flowers. Each bouquet contains 13 daisies.

• Bouquet S contains 30 flowers.

• Bouquet T contains 13 flowers.

Which statement is true?

• The probability of randomly selecting a daisy from Bouquet S is less than the probability of randomly selecting a daisy from Bouquet T.

• The probability of randomly selecting a daisy from Bouquet S is 1.

• The probability of randomly selecting a daisy from Bouquet S is equal to the probability of randomly selecting a daisy from Bouquet T.

• The probability of randomly selecting a daisy from Bouquet S is 3

Tags

CCSS.6.RP.A.3B

The manager of a movie theater randomly surveyed 50 people who entered the movie theater on Friday. The manager asked about the type of movie each person preferred. The results of the survey are shown in the table.Based on the results in the table, which statement about a person who will go to this theater next Friday is true?

• The person is three times as likely to prefer comedy as horror.

• The person is twice as likely to prefer drama as horror.

• The person is more likely to prefer horror or comedy than action or drama.

• The person is less likely to prefer horror or drama than action.

The 200 students in a school band will attend an awards dinner. A random survey of 25 of these students was conducted to determine how many of each meal should be prepared for the dinner. The results of the survey are shown. Based on the survey results, which of these is the best prediction of the meals wanted by the 200 students?

• 12 students want a beef meal.

• 8 students want a chicken meal.

• 5 students want a pasta meal.

• There are 16 students who want a beef meal.

• There are 52 students who want either a chicken meal or a pasta meal.

• There are 32 more students who want a beef meal than want a chicken meal.

• There are 24 more students who want a pasta meal than want a chicken meal.

Tags

CCSS.7.RP.A.3

Callie conducted a survey to determine students' favorite color. Of the students she surveyed, 18 out of 48 preferred blue. If there are 600 students in her school, how many would you expect to prefer blue?

• 225

• 320

• 200

• 240

Tags

CCSS.6.RP.A.3B

A school survey produced the following results. If about 300 students were surveyed, about how many have 4 or more pets at home?

• 18

• 60

• 54

• 300

Tags

CCSS.6.RP.A.3C