CBSE · Class 6-12

Class 11 · Mathematics (041)

Unit 14 · Class 11Mathematics (041)

Statistics and Probability

Probability

Axiomatic probability, sample spaces, and probability of events.

Formative-only for boards

Random experiments

Learn these concepts — they won't appear in the CBSE 2026-27 board paper.

Lessons

3 concepts

1
Sample Space & Events
Sample space $S$ = set of all outcomes. Event = subset of $S$ .
2
Axioms of Probability
$0 \le P(A) \le 1$ ; $P(S) = 1$ ; for mutually exclusive $A, B$ : $P(A \cup B) = P(A) + P(B)$ .
3
Addition Rule
$P(A \cup B) = P(A) + P(B) - P(A \cap B)$ .

Skills to practise

Skill · medium

Probability — Practice (coming soon)

Practice bank for this unit is in progress. You can still read the lessons above.