1. BELL-WORK Simplify (a) 5x + 15 5x – 15 (b) -4x3 . x3 – 2x4
(c) x2 + 4x – 5
1 – x
(d) 4 ∙
5a 2a2

2. Simplify (e) q + 5 ∙ 4q . 2 q + 4 (f) x2 – 16 .∙ 7x 6x x + 4
BELL-WORK
Simplify
(e) q + 5 ∙ 4q .
q + 4
(f) x2 – ∙ 7x
6x x + 4

3. CW Review

4. Exam 4.1
Exam will be on Monday!

5. Missing Class tomorrow?

6. HW 4.3(c)
Due tomorrow:
PW 12-7 #1-11, 19-26

7. HW 4.3(b) Solutions
8. PLOT; Min = 42, Q1 = 77.5, Q2 = 98, Q3 = 184.5, Max = 220
11. PLOT; Min = 20, Q1 = 24.75, Q2 = 32.5, Q3 = 45, Max = 50
13.
50%
75%
6th period
1st IR = 16, 6th IR = 16

8. Guiding question:
What are three types of probability?

9. Probability
Probability is the likelihood of a particular event happening.
Event: the outcome/result we are interested in.
We write probability of an event as:
P(Event)
0≤ P(Event) ≤ 1
P(Event) = 0 :
event impossible
P(Event) = 1 :
event certain

10. Probability Total probability is 1.
P(Event) + P(Event not occurring) = 1
P(Event not occurring) =
1 – P(Event)
P(Event) =
1 – P(Event not occurring)

11. Probability Three types of probability:
Theoretical: Probability in theory/perfect world
P(Event) = # of times event occurs
total number of outcomes
Experimental: Probability based on an actual experiment.
# of times experiment is done
Subjective: Probability based on experience, opinion, or intuition.

12. Theoretical Probability
A dartboard has 12 equally sized sections numbered from 1 to 12.
What is the probability of throwing a dart that lands on an odd number?
What is the probability of throwing a dart that lands on a multiple of 3?
What is the probability of throwing a dart that lands on a number that is not a multiple of 3?
TB pg 760 # 1-4, 10-21

13. Experimental Probability
In a survey on favorite pets 28 people chose dogs as their favorite pet, 15 chose cats, 4 chose birds, and 3 chose fish. If a survey participant is chosen at random, what is the probability that he or she prefers dogs as a pet?
TB pg 759 Got It? 4
A quality control worker samples 500 LCD monitors and finds cosmetic defects in 3 of them. If the company manufactures a run of 12,000 monitors, how many of them would you expect to have a cosmetic defect?
TB pg 760 Got It? 5
TB pg 761 # 28-32

14. Probability
Identify the method of calculating probability that resulted in the following statements:
(a) I’m 100% certain that you’ll be happy with this car.
Subjective probability
Sean flipped a coin 100 times and got 42 heads. He concludes that the probability of getting heads on a flip of his coin is 0.42.
Experimental probability
Based on data from the Department of Transportation, the chance of dying in an automobile accident is 1 in 7000 (per year).
The chance of rolling a 7 with a 12-sided die is 1/12.
Theoretical probability

15. Probability
Identify the method of calculating probability that resulted in the following statements:
Jeanne rolled a die 100 times and 12 of those times got a 6. She concludes that the probability of getting 6 on a roll of her die is 0.12.
Experimental probability
Li noted that there are six possible outcomes when you roll a die and 6 is one of those outcomes. He concluded that the probability of getting 6 on a roll of his die is 1/6.
Theoretical probability
Chantal noted that there are two possible outcomes when you flip a coin and heads is one of those outcomes. She concluded that the probability of getting heads on a flip of her coin is ½ or 0.5

16. Probability
Identify the method of calculating probability that resulted in the following statements:
Roger conducted a survey in his math class and found that 15% of the students are international students. He concluded that the probability of a student in his math class being an international student is 0.15.
Experimental probability
If there are 35 students in the class, how many of them are international?
5 students

17. Who wants to answer the Guiding question?
What are three types of probability?

18. Do corrections for HW!!!!! Signature
Quiz 4.2
Do corrections for HW!!!!!
Signature