This is Day 1 of a Unit called "Intro to Probability 1-Probabilities of Individual and Combined Events" After starting with a quick review of Two-Way tables and related vocabulary, students learn the basic probability formula and practice using it in a variety of contexts. Emphasis is placed on relating notation to meaning in a context.The full unit includes 5 lessons, a unit test, and two reassessments (which could be used for review before the test instead). All resources include answer keys.