Lesson Plan

Find the probability of an event built from two events with "and", "or" and "not", from a two-way table, an area model or a description of a situation, choosing the route to P(A and B) by what is given

Express "or", "neither", "at least one" and "exactly one" as sums of the four regions two events create, or as complements, and compute each

Complete a table of probabilities from P(A), P(B) and either P(A and B) or P(A or B)

Compute P(A and B) as P(A) × P(B | A) from a two-stage description, and fill the four regions when both stages are given

Decide whether two events are independent, and use P(A and B) = P(A) × P(B) only when they are

"Use one- and two-way tables, area models, and other representations to find relative frequency, probabilities, and conditional probabilities." "• Calculate, express, or interpret the probability or conditional probability of an event using a data display showing frequencies for a single variable, a two-way table, an area model, or a description of a situation. Infrequently, given a probability, determine an unknown number in a data display showing frequencies for a single variable, a two-way table, or a description of a situation, including using a probability to determine the frequency of an event." "In a group, 40% of the items are red. Of all the red items in the group, 30% also have stripes. What percentage of the items in the group are red and have stripes?"