CBSE 9 Math · U6
Statistics and Probability
CBSE Class 9 Mathematics Unit VI: graphical representation of data, measures of central tendency including weighted average, stacked and 100% stacked bar graphs, empirical probability, theoretical probability, tables, and tree diagrams.
Test yourself
A focused, distraction-free run through 60 multiple-choice questions. Hints if you need them; your score at the end.
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Topic 6.1
Data Organisation and Graphs
Collecting, organising, visualising and interpreting data using tables, histograms, stacked bars and 100% stacked bars.
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Topic 6.2
Mean and Weighted Average
Mean from raw and frequency data, weighted average, combined mean, and interpreting the effect of changes in data.
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Topic 6.3
Median, Mode and Choice of Average
Median, mode, effect of extreme values, and deciding which measure of central tendency is most appropriate.
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Topic 6.4
Empirical Probability and Randomness
Probability scale, randomness, empirical probability from observed data, repeated trials, and judging simulation claims.
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Topic 6.5
Theoretical Probability, Tables and Trees
Sample spaces, events, theoretical probability, complements, tree diagrams and two-stage tables.
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