Probability — Study Plan
IISER Aptitude Test · Mathematics
Step-by-step Probability study plan for IISER Aptitude Test Mathematics 2026 — structured month-wise approach to mastering this chapter.
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A structured approach to studying Probability for IISER Aptitude Test Mathematics.
Study Plan for Probability
Day 1–2: Learn the Theory
Study the chapter thoroughly. Note down definitions, formulas, and key concepts.
Day 3: Practice Problems
Solve practice questions and previous year IISER Aptitude Test problems. There are 370 questions available for this chapter.
Day 4: Revise & Test
Revise key formulas and concepts without looking at notes. Take a practice quiz to test your understanding.
What to Focus On
- P(A|B) = P(A ∩ B)/P(B) where P(B) ≠ 0
- Conditional probability lies between 0 and 1
- P(A'|B) = 1 - P(A|B)
- P(A ∩ B) = P(A) × P(B|A) for dependent events
- For three events: P(A ∩ B ∩ C) = P(A) × P(B|A) × P(C|A ∩ B)
- Always consider whether events are with or without replacement
- Independent events: P(A ∩ B) = P(A) × P(B)
- P(A|B) = P(A) for independent events
- Independent events with non-zero probabilities cannot be mutually exclusive
Common Mistakes to Avoid
If P(A|B) = P(A), then events A and B are mutually exclusive
P(A|B) = P(B|A) always
In probability distribution, the sum of all x values equals 1
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