Assuming that it is equally likely to be born in any of the 12 months of the year, what is the Counting and P( A or and B) 2 probability that in a group of six, at least two people have birthdays in the same month? (P) probability ??? the complementary rule: P( not 2. probability problems using Venn diagrams, trees, two-way contingency tables and other techniques (like the fundamental counting pri