Mathematics · Class 11
Probability
Learn Probability with notes, examples, and practice questions.
2 sections15–25 min read6 MCQs · 2 examples
Chapter Overview
Class 11 probability: sample space, events, axiomatic approach, conditional probability intro, multiplication theorem, and independent events.
Basics
Classical
P(E) = favourable/total (equally likely)
Complement
P(E′) = 1 − P(E)
Addition
P(A∪B) = P(A)+P(B)−P(A∩B)
Conditional
P(A|B) = P(A∩B)/P(B)
Solved Examples
Step-by-step solutions — read each step before checking the final answer.
Dice
P(getting even on die).
- 13 outcomes/6
Answer
1/2
Cards
P(king from deck).
- 14/52=1/13
Answer
1/13
Key Points to Remember
- ✓ 0 ≤ P(E) ≤ 1
- ✓ Sure event P=1; impossible P=0
- ✓ Independent: P(A∩B)=P(A)P(B)
Exam Tips
- • Define sample space first
- • Use complement for 'at least one'
Practice MCQs — Probability
Test your understanding with topic-wise multiple choice questions. Explanations appear after each answer.
Question 1 of 6Score: 0/0
P(sure event)=