Percent Population

The number of pages per book in the young adult fiction section of the library, for a random sample of 25 books are shown. Which statements are true? Choose the TWO correct answers.

• It may be estimated that the percentage of young adult fiction books with more than 100 pages is 40%.

• It may be estimated that the percentage of young adult fiction books with less than 100 pages is 15%.

• It is unlikely that the percentage of young adult fiction books with more than 100 pages will be greater than 80%.

• It is likely that the percentage of young adult fiction books with less than 100 pages is actually 50%.

• A second random sample of 25 books in which 42% of the books have less than 100 pages and 58% of the books have more than 100 pages supports the results from the original sample.

A representative sample of 50 students were surveyed about they prefer on the lunch menu at their school. The table shows their responses. In a group of 250 students, how many students are expected to prefer pizza?

Mathematical Equivalence

ON

Tags

CCSS.6.RP.A.3B

The population of a city was 500,000 last year. This year, it increased to 550,000. What is the percent increase in population?

• 5%

• 15%

• 20%

• 10%

Tags

CCSS.6.RP.A.3C

A team of biologists used population sampling to determine that there are currently 350 chameleons living in a particular ecosystem. That same ecosystem had a population of 580 chameleons three years ago. Which is closest to the percent decrease in the chameleon population?

• 230%

• 40%

• 66%

• 28%

Tags

CCSS.6.RP.A.3C

• A
• B
• C
• D

A group of wildlife conservationists are trying to determine what is causing a recent decrease in the number of white-tail deer in a particular area. Two years ago, they estimated the population to be 680. Recently, the population was estimated to be 410. Which is closest to the percent of change in the white-tail deer population?

• 40%

• 66%

• 270%

• 54%

Tags

CCSS.6.RP.A.3C

Bald eagles have made an amazing recovery from the brink of extinction. In the mid-1960s, there were only 450 breeding pairs in the lower 48 states. Since that time, the bald ealges have made a comeback due to habitat restoration. There are now about 10,000 breeding pairs in the lower 48 states. By about what percent has the number of bald eagle breeding pairs increased?

• 54%

• 95%

• 10%

• 2,122%

Tags

CCSS.6.RP.A.3C

Bees are responsible for the pollinaton that leads to the production of 1/3 of all our food. Sadly, the number of hives has declined drastically in recent years. In Central Texas, the number of hives has dropped from 276 to 125 in the last ten years. Which is closest to the percent decrease in the number of bee hives in central Texas?

• 55%

• 151%

• 120%

• 90%

Tags

CCSS.6.RP.A.3C

The deer population is estimated to be 17,600 in northern Illinois, but an actual count was 21,300. What is the percent error?

• 21%

• 17.37%

• 17.4%

• 21.02%

Tags

CCSS.6.RP.A.3C

The deer population is estimated to be 17,600 in northern Illinois, but an actual count was 21,300. What is the percent error?

• 21%

• 17.37%

• 17.4%

• 21.02%

Tags

CCSS.6.RP.A.3C