CBSE 11 Math · U5
Statistics and Probability
Measures of dispersion and axiomatic probability for events from the CBSE Class 11 Mathematics syllabus.
Test yourself
A focused, distraction-free run through 25 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 5.1
Range and Mean Deviation
Dispersion using range and mean deviation for ungrouped and discrete-frequency data
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Topic 5.2
Variance and Standard Deviation for Ungrouped Data
Variance, standard deviation, and consistency for finite ungrouped observations
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Topic 5.3
Grouped Data and Comparing Dispersion
Frequency distributions, class marks, and spread comparisons
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Topic 5.4
Events and Set Operations in Probability
Not, and, or, exhaustive and mutually exclusive events using given finite sets
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Topic 5.5
Axiomatic Probability and Event Bounds
Valid probability assignments, event containment, bounds, and exhaustive partitions
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