L1-30 Understand probability on a scale from 0 (impossible) to 1 (certain) and use probabilities to compare the likelihood of events Quiz: Pearson Edexcel Functional Skills Maths, Unit 1

The 20 questions

1. On the probability scale, what does 0 mean?

   • certain
   • likely
   • impossible
   • evens

2. What does 1 mean on the probability scale?

   • equally likely
   • unlikely
   • impossible
   • certain

3. Which probability means an event is equally likely to happen or not happen?

   • 0.25
   • 0.5
   • 0
   • 1

4. Which probability represents the most likely event?

   • 0.05
   • 0.9
   • 0.2
   • 0.5

5. Which word best describes a probability of 0.1?

   • likely
   • certain
   • evens
   • unlikely

6. In what three formats can probabilities be written?

   • integer, ratio, tally
   • fraction, decimal, percentage
   • range, estimate, total
   • mean, median, mode

7. Can a valid probability ever be equal to 1.5?

   • only sometimes
   • yes
   • no
   • always

8. What is 0.75 written as a fraction in simplest form?

   • 3/4
   • 75/10
   • 7/5
   • 3/7

9. Rain has a probability of 0.65. Which description fits best?

   • likely
   • certain
   • impossible
   • unlikely

10. Put these in order from least to most likely: 0.4, 1, 0 and 0.75.

    • 1, 0.75, 0.4, 0
    • 0, 0.75, 0.4, 1
    • 0, 0.4, 0.75, 1
    • 0.4, 0, 0.75, 1

11. A spinner has probability 1/4 red and 1/2 blue. Which colour is more likely?

    • blue
    • neither
    • red
    • equal

12. A bag of 10 sweets has 3 red ones. What is the probability of picking red, as a decimal?

    • 3.3
    • 0.3
    • 0.33
    • 0.03

13. A fair six-sided dice is rolled. Is getting a number less than 7 certain, impossible, likely or unlikely?

    • certain
    • likely
    • impossible
    • unlikely

14. What is the probability of rolling a 7 on a standard six-sided dice?

    • certain
    • unlikely
    • impossible
    • likely

15. Which probability describes an event that is nearly certain?

    • 0.00
    • 0.50
    • 0.01
    • 0.99

16. Which probability describes an event that happens about 9 times in every 10?

    • 0.1
    • 0.9
    • 9
    • 0.09

17. Three outcomes have probabilities 0.35, 0.4 and 0.25. Is this valid?

    • yes
    • no
    • only if doubled
    • need more data

18. Event A has probability 0.6 and B has 0.45. What is the difference in likelihood?

    • 0.15
    • 1.05
    • 0.25
    • 0.05

19. A probability is 3/5. What is it as a decimal and as a percentage?

    • 0.5 and 50%
    • 1.67 and 167%
    • 0.6 and 60%
    • 0.35 and 35%

20. An event has probability 0.8. What is the probability that it does not happen?

    • 0.08
    • 0.8
    • 1.8
    • 0.2

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