Basic Probability

Basic Probability Quiz

Spec E8.1 · Cambridge IGCSE Maths: Quiz

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5 questions, one answer each

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  1. 1. What value on the probability scale represents an event that is certain to happen?

    • A. 1
    • B. 0
    • C. 0.5
    • D. 100

  2. 2. A bag contains 4 red and 6 green counters. What is P(red)P(\text{red})?

    • A. 25\frac{2}{5}
    • B. 46\frac{4}{6}
    • C. 610\frac{6}{10}
    • D. 14\frac{1}{4}

  3. 3. P(A)=0.28P(A) = 0.28. What is P(A′)P(A')?

    • A. 0.72
    • B. 0.28
    • C. 1.28
    • D. 0.5

  4. 4. A biased coin has P(heads)=0.7P(\text{heads}) = 0.7. What is P(tails)P(\text{tails})?

    • A. 0.3
    • B. 0.5
    • C. 0.7
    • D. 0.4

  5. 5. A game has three outcomes: win, draw, lose, with P(win)=0.35P(\text{win})=0.35 and P(draw)=0.2P(\text{draw})=0.2. What is P(lose)P(\text{lose})?

    • A. 0.45
    • B. 0.55
    • C. 0.65
    • D. 0.15

Quiz