1. 7.8 Geometric Probability
Goal: To use segment and area models to find the probabilities of events

3. You may recall that the probability of an event is the ratio of the number of favorable outcomes to the number of possible outcomes.
P(event) =
favorable outcomes
possible outcomes

4. Finding Probability Using Segments
Sometimes you can use a geometric probability model in which you let points represent outcomes.
Finding Probability Using Segments
P(event) =
length of favorable segment outcomes
length of entire segment

6. Finding Probability Using Area
If the points of a region represent equally-likely outcomes, then you can find probabilities by comparing areas.
Finding Probability Using Area
P(event) =
area of favorable region
area of entire region

9. Assignment: pp #1-21, 23-25, 55, 56