Probability Lesson 3 Geometric Probability and the Addition Rule

The Standard  MCC9-12.S.CP.7 Apply the Addition Rule P{A or B)=P(A)+P(B)-P(A and B), and interpret the answer in terms of the model

Learning Target  I can use geometry or the addition rule to determine probabilities.

Vocabulary  Geometric probability- the probability of an event is based on a ratio of geometric measures such as length or area.

Models for geometric probability  There are three models for geometric probability:  Length  Angle measure  Area

Geometric Probability: Length.. A point is chosen at random on Find the probability that the point is on length

Geometric Probability : Length

Geometric Probability: Angle Measure

 3.Look at the example for angle measure. What is the probability that the pointer DOES land on white? ______________________  4.How is your answer to Exercise 3 related to the answer in the example? Why?

Geometric Probability: Area

 5.Look at the example for area. Find the probability that a point chosen randomly inside the rectangle is in the parallelogram. ______________________