Concept Checkers, p203 Session Unit 2: 9. Probability Concepts (B/A/A/C) A. (0.3)(0.6) + (0.5)(0.3) + (0.2)(0.1) = 0.35. C. Bayes’ formula: P(Ge|Gs) = P(Gs|Ge) × P(Ge) P(Gs)