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CCEA GCSE Mathematics Probability overview quiz quiz

16questions. Pick an answer and you'll see why right away.

  1. A probability of 0 means the event is:

  2. A fair die is rolled. What is the probability of an even number?

  3. If P(rain)=0.35P(\text{rain}) = 0.35, what is P(no rain)P(\text{no rain})?

  4. A spinner has P(1)=0.2P(1) = 0.2, P(2)=0.5P(2) = 0.5. What is P(3)P(3) if these are the only outcomes?

  5. Two mutually exclusive events have P(A)=0.3P(A) = 0.3 and P(B)=0.4P(B) = 0.4. What is P(A or B)P(A \text{ or } B)?

  6. Two dice are thrown. How many outcomes are in the sample space?

  7. On a tree diagram, to find the probability of one outcome AND then another, you:

  8. A coin is flipped 3 times. What is P(three heads)P(\text{three heads})?

  9. A bag has 5 red and 5 blue. Two are drawn without replacement. P(red second∣red first)P(\text{red second}\mid\text{red first}) is:

  10. In set notation, A∩BA \cap B means:

  11. When completing a Venn diagram, you should fill in first:

  12. Of 50 people, 30 like tea, 25 like coffee, 15 like both. How many like neither?

  13. A′A' (the complement of A) means:

  14. A spinner is spun 400 times and lands on green 80 times. Estimate P(green)P(\text{green}).

  15. Which estimate of probability is most reliable?

  16. If P(six)=0.1P(\text{six}) = 0.1 on a biased die rolled 200 times, the expected number of sixes is: