Probability Involving AND and OR Let's examine AND first:In probability, an outcome is in event "A and B" only when the outcome is in both event A and event B. In Venn Diagrams, we learned that an element was in the intersection "A and B", only when the element was in BOTH sets. n(A and B) means the number of outcomes in both A and B. n(S) means the total number of … [Read more...] about Probability Involving AND and OR