Proportion Prediction Quiz

Jenny randomly selects 20 boxes of crayons from the shelf and finds two boxes with at least one broken crayon. If the shelf holds 130 boxes, how many would you expect to have at least one broken crayon?

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MAFS.7.SP.1.2

A manager samples receipts of every fifth person in line. Out of 50 people, 4 had a mispriced item. If 600 people go to the store each day, how many can you expect to have a mispriced item?

• 50 people

• 48 people

• 80 people

• 12 people

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MAFS.7.SP.1.2

A middle school has 490 students. Mae surveys a random sample of 60 students and finds that 24 of them have dogs. How many students are likely to have dogs?

• 8 students

• 40 students

• 192 students

• 196 students

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MAFS.7.SP.1.2

A random sample of dogs at different animal shelters shows that 12 of 60 dogs are puppies. The cities shelters collectively house 1,200 dogs each year. Estimate how many are puppies.

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MAFS.7.SP.1.2

A manufacturer fills an order for 4,200 smart phones. The quality inspector selects a random sample of 60 phones and finds that 4 are defective. How many smart phones in the order are likely to be defective?

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MAFS.7.SP.1.2

A store manager selects 30 cartons of eggs and finds 4 cartons that have cracked eggs. If the store has 105 cartons of eggs, how many cartons can she expect to have cracked eggs in them?

• 14 cartons

• 7.5 cartons

• 15 cartons

• 28 cartons

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MAFS.7.SP.1.2

A random sample of 120 ticket buyers is surveyed, and 28 buyers made their purchase on the first day tickets were being sold. How many of the 4,200 total tickets are likely to have been purchased on the first day they were available?

• 150 tickets

• 35 tickets

• 980 tickets

• 233 tickets

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MAFS.7.SP.1.2

At a local grocery store, 12 out of 30 customers bought pastries from the bakery. If the store had a total of 830 customers, predict how many bought pastries from the bakery.

• 410

• 232

• 226

• 332

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MAFS.7.SP.1.2

A survey was conducted to determine whether talking or texting on the phone can be a distraction. A total of 37,000 cell phone owners were surveyed and 9250 of them had someone who was talking or texting walk into them. If 192 students at RCMS were randomly surveyed, predict how many would say that someone has walked into them while texting or talking on their phone.

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MAFS.7.SP.1.2

The population of Yulee, Florida in 2015 was 11,672. In the same year a seed company surveyed people to ask them what type of seeds they plan to buy. The results are shown in the circle graph. Based on the results, I predict ​that ​​​​ (a)   ​ people bought flower seeds in 2015.

• 2,918
• 1,517
• 7,236
• 8,754

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MAFS.7.SP.1.2