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Two Basic Rules of Probability Quiz

12 questions math Grades 9-12

The question sheet

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  1. In late 2011, 42% approved of the mayor. What proportion disapproved?

    • 42%
    • 58%
    • 60%
    • 57%
    Reveal answer

    Answer: 58%

    Source evidence

    PDF page 228: • In late 2011, the percentage of popular approval was measured at 42 percent.

    PDF page 228: b. What proportion in the poll disapproved of the mayor, according to the results from late 2011?

  2. Based on mid-2011 data, what is the probability a person supported the mayor?

    • 0.58
    • 0.57
    • 0.60
    • 0.42
    Reveal answer

    Answer: 0.57

    Source evidence

    PDF page 228: • In mid-2011, 57 percent of the population approved of his actions.

    PDF page 228: d. What is the probability that a person supported the mayor, based on the data collected in mid-2011?

  3. What is the sample size for the Canadian mayor popularity poll?

    • 110,000
    • 6,500,000
    • 1,046
    • 67
    Reveal answer

    Answer: 1,046

    Source evidence

    PDF page 228: 1,046 people to measure the mayor’s popularity. Everyone polled expressed either approval or disapproval. These are the results their poll produced:

    PDF page 228: a. What is the sample size for this study?

  4. In the special deck of 10 cards, how many are green?

    • Two
    • Five
    • Four
    • Three
    Reveal answer

    Answer: Four

    Source evidence

    PDF page 229: 87. A special deck of cards has 10 cards. Four are green, three are blue, and three are red. When a card is picked, its

  5. According to the blood data, what percent of people have type O blood?

    • 62.3 percent
    • 15 percent
    • 43 percent
    • 52 percent
    Reveal answer

    Answer: 43 percent

    Source evidence

    PDF page 231: website, a person with type O blood and a negative Rh factor (Rh–) can donate blood to any person with any bloodtype. Their data show that 43 percent of people have type O blood and 15 percent of people have Rh– factor; 52 percent of people have type O or Rh– factor.

  6. According to the blood data, what percent of people have Rh– factor?

    • 15 percent
    • 43 percent
    • 52 percent
    • 62 percent
    Reveal answer

    Answer: 15 percent

    Source evidence

    PDF page 231: website, a person with type O blood and a negative Rh factor (Rh–) can donate blood to any person with any bloodtype. Their data show that 43 percent of people have type O blood and 15 percent of people have Rh– factor; 52 percent of people have type O or Rh– factor.

  7. What percent of people have type O or Rh– factor?

    • 58 percent
    • 52 percent
    • 15 percent
    • 43 percent
    Reveal answer

    Answer: 52 percent

    Source evidence

    PDF page 231: website, a person with type O blood and a negative Rh factor (Rh–) can donate blood to any person with any bloodtype. Their data show that 43 percent of people have type O blood and 15 percent of people have Rh– factor; 52 percent of people have type O or Rh– factor.

  8. What percent of courses have both a research paper and a final exam?

    • 20 percent
    • 40 percent
    • 10 percent
    • 32 percent
    Reveal answer

    Answer: 32 percent

    Source evidence

    PDF page 231: that 32 percent of courses have a research paper and a final exam. Let F be the event that a course has a final exam. Let R be the event that a course requires a research paper.

  9. What percent of students have taken a distance learning class?

    • 20 percent
    • 10 percent
    • 40 percent
    • 32 percent
    Reveal answer

    Answer: 10 percent

    Source evidence

    PDF page 231: 100. A college finds that 10 percent of students have taken a distance learning class and that 40 percent of students

  10. What percent of students are part-time students?

    • 20 percent
    • 40 percent
    • 60 percent
    • 10 percent
    Reveal answer

    Answer: 40 percent

    Source evidence

    PDF page 231: 100. A college finds that 10 percent of students have taken a distance learning class and that 40 percent of students

  11. In the returned-envelope study, what percent were returned overall?

    • 56 percent
    • 64 percent
    • 44 percent
    • 31 percent
    Reveal answer

    Answer: 44 percent

    Source evidence

    PDF page 230: to return found money than other people. They dropped 64 stamped, addressed envelopes with $10 cash in different classrooms on the George Washington campus. Forty-four percent were returned overall. From the economics classes 56 percent of the envelopes were returned. From the business, psychology, and history classes 31 percent were returned.

  12. From the economics classes, what percent of envelopes were returned?

    • 31 percent
    • 56 percent
    • 44 percent
    • 62 percent
    Reveal answer

    Answer: 56 percent

    Source evidence

    PDF page 230: to return found money than other people. They dropped 64 stamped, addressed envelopes with $10 cash in different classrooms on the George Washington campus. Forty-four percent were returned overall. From the economics classes 56 percent of the envelopes were returned. From the business, psychology, and history classes 31 percent were returned.

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Source

Statistics

Statistics by OpenStax, used under CC BY 4.0. Changes made by Stratacademy.

Original textbook · CC BY 4.0

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