BELL-WORKBELL-WORKSimplify

(a) 5x + 15

5x – 15

(b) -4x3 .

x3 – 2x4

(c) x2 + 4x – 5

1 – x

(d) 4 ∙ 3 .

5a 2a2

BELL-WORKBELL-WORKSimplify

(e) q + 5 ∙ 4q .

2 q + 4

(f) x2 – 16 .∙ 7x

6x x + 4

CW ReviewCW Review

Exam 4.1Exam 4.1Exam will be on Monday!

Missing Class tomorrow?Missing Class tomorrow?

HW 4.3(c)HW 4.3(c)Due tomorrow:

PW 12-7 #1-11, 19-26

HW 4.3(b) SolutionsHW 4.3(b) Solutions8. 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.

(a) 50%

(b) 75%

(c) 6th period

(d) 1st IR = 16, 6th IR = 16

Guiding question:

What are three types of probability?

ProbabilityProbability 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) ≤ 1P(Event) = 0 :

event impossibleP(Event) = 1 :

event certain

ProbabilityTotal probability is 1.

P(Event) + P(Event not occurring) =

1

P(Event not occurring) =

1 – P(Event)

P(Event) =

1 – P(Event not occurring)

ProbabilityThree types of probability:

Theoretical: Probability in theory/perfect worldP(Event) = # of times event occurs

total number of outcomes

Experimental: Probability based on an actual experiment.P(Event) = # of times event occurs

# of times experiment is done

Subjective: Probability based on experience, opinion, or intuition.

Theoretical Probability A dartboard has 12 equally sized sections numbered from 1 to

12.

a. What is the probability of throwing a dart that lands on an odd number?

b. What is the probability of throwing a dart that lands on a multiple of 3?

c. 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

Experimental ProbabilityIn 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

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(b) 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(c) Based on data from the Department of Transportation, the

chance of dying in an automobile accident is 1 in 7000 (per year).

Experimental probability(d) The chance of rolling a 7 with a 12-sided die is 1/12.

Theoretical probability

Probability Identify the method of calculating probability that resulted in the

following statements: (e) 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(f) 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(g) 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

Theoretical probability

Probability Identify the method of calculating probability that

resulted in the following statements:

(h) 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

Who wants to answer the Guiding question?

What are three types of probability?

Quiz 4.2Quiz 4.2Do corrections for HW!!!!!

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