Sample Space
Sample space is the set or list of all possible outcomes of a random experiment.
Practice This ConceptMain explanation
Teacher explanation
A correct sample space prevents wrong probability answers. For simple experiments, list every outcome once and make sure no possible result is left out.
Example
For tossing one coin, the sample space is {H, T}. For rolling one die, it is {1, 2, 3, 4, 5, 6}.
Simple analogy
Sample space is the full menu of outcomes.
Common confusion
Students sometimes list only favourable outcomes and call that the sample space.
Exam tip
Write the sample space before solving probability questions where two conditions or two stages are involved.
Study the sample space diagram carefully
Use the labelled diagram to keep sample space clear in short answers and revision.
What this diagram makes clear
This diagram keeps the labels and direction of sample space in the right order.
Where this helps in exams
Use this for labelled diagram work and short exam answers on sample space.
Revision cue
Revise sample space through the labels before writing the answer.
Answer writing and exam use
1-mark use
Write the exact meaning of sample space in one clean line.
2-mark use
Define sample space and add one example or condition.
3-mark use
Explain sample space, show the method or example, and mention the common mistake.
Practice this concept with focused MCQs
Open the concept quiz intro first, review the test details, and then start a focused MCQ set from this concept only. Instant score and answer review are live now.
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