1. 11-8 Geometric Probability

2. Example If you threw a magnet and it landed on the picture from the warm up, what is the probability that the magnet lands inside the small circle? (known as the “bull’s eye”) Area you are trying for Total Area

3. RULE: To find the Geometric Prob: Area of what they ask for Area of WHOLE shape

4. Example Draw a line GR Draw point L as the midpoint of GR Draw point A as the midpoint of LR Draw point H as the midpoint of AR What portion of GR is LH? G RLAH 4211 3/8

5. Example A subway stops every 20 minutes, waits 3 minutes and then leaves. If you arrive at a random time, what is the prob. you will be able to board the train? Shortcut: It’s always “little”/”big” –Reduce when necessary!! 3_ 20

6. TOO Page 462 #1-3 ***Watch Out #1—Use RW not whole line Answers: 1)a) 1/5b) 3/5c) 4/5 d) 1e) 0f) 1 2) 1/3 3) 15π/100 = 0.471, π/100 = 0.031

7. Homework Page 463 #1-5,skip 4b Pg. 465 Self Test #1-7, skip 6b QUIZ Tomorrow! Study Session: Wed. 2:30-3:15