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studyStatistics & Probability
FoundationMaths revision

Basic Probability

Build probability from equally likely outcomes, complements and simple combined events.

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Focus points
✓Use probability as favourable/total outcomes.
✓Apply complements.
✓Model simple sample spaces.
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The Wise Owl

Guides study flow, revision planning, and calmer focus sessions.

target Practice set

Question lineup

Try each question first, reveal a hint when you need one, then check the worked answer. Mark them done as you go — finish the set to claim your chips.

8 revision questions
Question 1FluencyCore
Original practice · Free Online Revision
Skill · single event
A fair die is rolled. Find P(rolling a multiple of 3).
Question 2FluencyCore
Original practice · Free Online Revision
Skill · single event
A bag has 5 red, 3 blue and 2 green counters. Find P(blue).
Question 3FluencyCore
Original practice · Free Online Revision
Skill · complement
If P(rain)=0.27, find P(no rain).
Question 4FluencyCore
Original practice · Free Online Revision
Skill · sample space
Two fair coins are tossed. List the sample space.
Question 5FluencyCore
Original practice · Free Online Revision
Skill · combined event
Two fair coins are tossed. Find P(exactly one head).
Question 6FluencyCore
Original practice · Free Online Revision
Skill · missing probability
A spinner has sectors with probabilities 0.15, 0.25, 0.30 and x. Find x.
Question 7ReasoningStretch
Original practice · Free Online Revision
Skill · probability reasoning
A student says P(getting at least one 6 in two dice rolls)=2/6. Explain the error and find the correct probability.
Question 8ChallengeStretch
Original practice · Free Online Revision
Skill · sample-space counting
A fair die is rolled twice. Find P(the sum is 8).