6 A ball is drawn from a box containing 4 red balls, 5 blue and 6 green. What is the probability that the ball will be red or blue? What is the probability that it is blue? Subject Probability Theory Events Probability Properties Probability Formula Combinatorics Probab. Addition Rule Multiplication Rule Conditional Probability Contingency Tables Tree Diagrams Law of Total Probability Bayes' Theorem Probability Problems 1 Probability Problems 2 Probability Problems 3 Site Math Formulas Word Problems Worksheets Arithmetic Algebra Geometry Trigonometry Analytic Geometry Calculus Statistics