data/knowledge_base/probability.md

Probability – JEE Level

Basic Formula

P(E) = favorable outcomes / total outcomes

Conditional Probability

P(A|B) = P(A ∩ B) / P(B)

Bayes’ Theorem

P(A|B) = (P(B|A) × P(A)) / P(B)

Common Mistakes

• Assuming independence without checking
• Ignoring total probability