P3 relate relative expected frequencies to theoretical probability, using appropriate... Quiz: Pearson Edexcel Maths, Unit 5

The 20 questions

1. In probability, what does a value of 0 indicate about an event?

   • Unlikely
   • Even chance
   • Certain
   • Impossible

2. On the probability scale, what value represents an event that is certain to happen?

   • 0
   • -1
   • 0.5
   • 1

3. What is a probability of 0.5 expressed as in everyday language?

   • Evens
   • Certain
   • Impossible
   • Unlikely

4. What is the probability of rolling a 7 on a standard six-sided die?

   • 1
   • 0
   • 1/6
   • 1/7

5. A bag contains only red counters. What is the probability of picking a red counter?

   • 0.1
   • 1
   • 2
   • 0

6. A theoretical probability is 0.25. Which relative frequency is most likely after many trials?

   • Greater than 1
   • Close to 0.25
   • About 0.5
   • Exactly 0

7. What is 3/10 written as a decimal on the 0 to 1 scale?

   • 3.3
   • 0.03
   • 0.3
   • 0.7

8. What percentage does a probability of 0.85 correspond to?

   • 85%
   • 8.5%
   • 185%
   • 0.085%

9. Which probability is closest to certain: 0.92, 0.5, 0.08 or 0.2?

   • 0.92
   • 0.5
   • 0.2
   • 0.08

10. Which value is the largest: 2/5, 0.35 or 45%?

    • 45%
    • 0.35
    • Equal
    • 2/5

11. What explains a fair coin landing on 30 tails out of 50 tosses?

    • Guaranteed outcome
    • Biased coin
    • Mathematical error
    • Chance variation

12. A bag has 4 green counters out of 10 counters. What is the probability of picking a green counter?

    • 0.6
    • 4
    • 0.04
    • 0.4

13. Which description fits an event that almost never happens?

    • Probability close to 1
    • Probability exactly 0.5
    • Probability close to 0
    • Probability greater than 1

14. What are the limits of values on the probability scale?

    • 0 and 1 inclusive
    • 0 and 100 inclusive
    • −1 and 1
    • 1 and infinity

15. A word is MATHS. What is the probability of picking a vowel if one letter is chosen at random?

    • 2/5
    • 1/4
    • 1/5
    • 4/5

16. After 20 flips a coin gives 12 heads, and after 2000 flips it gives 1012 heads. Which theoretical probability does this suggest?

    • 0.12
    • 0.6
    • 0.5
    • 1.012

17. A card is drawn at random from a standard 52-card pack. What is the probability it is an ace?

    • 1/4
    • 1/13
    • 4/13
    • 1/52

18. Which of these is a valid format for writing a probability?

    • Whole number
    • Percentage
    • Ratio over 10
    • Negative value

19. Event A has probability 0.3. What is the probability that A does not happen?

    • 1.3
    • 0.7
    • 0.4
    • 0.3

20. What is 1/8 written as a percentage?

    • 18%
    • 12.5%
    • 8%
    • 1.25%

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