GCSE · Basic probability

Probability of a single eventExam-style questions

Why a probability is a share of the whole — so it lives between 0 and 1, why P(A) = favourable ÷ total needs equally likely outcomes, and how the "it all adds to 1" rule drives complements, missing table entries and expected numbers.

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13 questions · GCSE (Higher) level · mark scheme and worked solution on each · no sign-up to try

DifficultyAllLevel 1Level 2Level 3Level 4Level 5
  1. 1
    A fair six-sided dice is rolled. Write down the probability of rolling a 44.
    Level 1 · 1 markTry it
  2. 2
    The probability that it rains tomorrow is 0.30.3. Write down the probability that it does not rain tomorrow.
    Level 1 · 1 markTry it