Math 8, Unit 1 - Probability

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• Math 8, Unit 1 - Probability

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Hoops
Event Outcomes
Laws of Probability
Probability Applications
Vocabulary
Wild Card
5 pts.
5 pts.
5 pts.
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5 pts.
10 pts.
10 pts.
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10 pts.
15 pts.
15 pts.
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20 pts.
20 pts.
20 pts.
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20 pts.
25 pts.
25 pts.
25 pts.
25 pts.
25 pts.
Buzzer Shot
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Hoops
Event Outcomes
Laws of Probability
Probability Applications
Wild Card
Vocabulary
5 pts.
5 pts.
5 pts.
5 pts.
5 pts.
10 pts.
10 pts.
10 pts.
10 pts.
10 pts.
15 pts.
15 pts.
15 pts.
15 pts.
15 pts.
20 pts.
20 pts.
20 pts.
20 pts.
20 pts.
25 pts.
25 pts.
25 pts.
25 pts.
25 pts.
Buzzer Shot
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5 pt. Question from Vocabulary
The illustration below represents which of the
following? A Counting Principle B
Complement C Simple Event D Tree Diagram
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5pt. Answer from Vocabulary
D) Tree Diagram
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10 pt. Question from Vocabulary
Events for which the outcome of one event does
not affect the probability of the other are
called _________. ExampleA bag contains 3 red
marbles and 2 blue marbles. Drawing a red marble,
replacing it, and then drawing a blue marble is
an example of independent events. A Counting
Events B Dependent Events C Independent
Events D Simple Events
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10 pt. Answer from Vocabulary
C) Independent Events
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15 pt. Question from Vocabulary
If an event A can occur in m ways and for each of
these m ways, an event B can occur in n ways,
then events A and B can occur in m ? n ways. This
principle can be generalized to more than two
events that happen in succession. So, if for each
of the m and n ways A and B can occur
respectively, there is also an event C that can
occur in s ways, then events A, B, and C can
occur in m ? n ? s ways. A Complement B
Compound Event C Counting Principle D
Construction
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15 pt. Answer from Vocabulary
C) Counting Principle
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20 pt. Question from Vocabulary
An event consisting of just one outcome. A
_________ event can be represented by a single
branch of a tree diagram. A Compound Event B
Independent Event C Simple Event D None of the
above
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20 pt. Answer from Vocabulary
C) Simple Event
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25 pt. Question from Vocabulary
A number from 0 to 1 (or 0 to 100) that
describes how likely an event is to
occur. Example A bag contains 3 red marbles and
4 blue marbles. The probability of randomly
choosing a red 3/7. A Complement B
Probability C Sample Space D Simple Event
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25 pt. Answer from Vocabulary
B) Probability
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5 pt. Question fromEvent Outcomes
The tree diagram represents the possible outcomes
for a team after three games in a state football
championship. (W means win and L means loss.) The
championship rules are as follows There are no
ties. A team is eliminated if it loses 2 games in
a row. How many outcomes are there for the fourth
game? A 6 B 8 C 10 D 12
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5 pt. Answer fromEvent Outcomes
B) 8
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10 pt. Question from Event Outcomes
Marcella has three hats, two gloves, and four
scarves at home. How many different combinations
of hats, gloves, and scarves can she wear to
school in a particular morning? A less than 9 B
9 C 12 D 24
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10 pt. Answer from Event Outcomes
D) 24
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15 pt. Question from Event Outcomes
A math course has four sections. Three students
each randomly choose a section to enroll in. In
how many different ways can the three students
choose to enroll? A 6 B 9 C 27 D 64
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15 pt. Answer fromEvent Outcomes
D) 64
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20 pt. Question from Event Outcomes
Which answer gives the sample space for the
outcome of rolling a single number cube? A 0,
1, 2, 3, 4, 5, 6 B 1, 2, 3, 4, 5, 6 C 0,
1, 2, 3, 4, 5, 6 D the number facing
up on a given roll
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20 pt. Answer fromEvent Outcomes
B 1, 2, 3, 4, 5, 6
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25 pt. Question from Event Outcomes
A platter of fruit has 18 apples, 10 pears, 8
oranges, and 4 mangos. Pieces of fruit are picked
at random. What is the probability of getting a
piece of fruit that is NOT an apple? A 55 B
45 C 25 D 20
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25 pt. Answer fromEvent Outcomes
A 55
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5 pt. Question fromLaws of Probability
David spins this spinner two times. What is the
probability that the spinner lands on 1 both
times?
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5 pt. Answer fromLaws of Probability
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10 pt. Question from Laws of Probability
A jar contains 6 red balls, 3 green balls, 5
white balls and 7 yellow balls. Two balls are
chosen from the jar, with replacement. What is
the probability that both balls chosen are green?
A C B D none of the above
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10 pt. Answer from Laws of Probability
C)
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15 pt. Question from Laws of Probability
Sean has two boxes. Box 1 contains 3 stiff
brushes, 2 soft brushes, 4 mane combs, and 2 hoof
picks. He also has a second box containing 2
shedding blades and 1 curry comb. What is the
probability that Sean selects a stiff brush from
box 1 and a shedding blade from box 2? A
C B 6 D
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15 pt. Answer from Laws of Probability
D)
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20 pt. Question from Laws of Probability
In which situations do you calculate outcomes
with the counting principle using addition and
multiplication? A and for multiplication
or for addition B of for multiplication
with for addition C with for multiplication
then for addition D or for multiplication
and for addition
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20 pt. Question from Laws of Probability
A) and for multiplication or for addition
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25 pt. Question from Laws of Probability

• How can you determine if a game is fair? choose
  the best answer.
• A If the game has a dependent setting
• B If all players are independent
• C If the rules are the same for all players
• D If all outcomes are equally likely

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25 pt. Question from Laws of Probability
D) If all outcomes are equally likely
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5 pt. Question fromProbability Applications
If A and B are independent events such that
P(A)0.35 and P(B)0.40, what is the P(A or
B)? A 0.875 B 0.75 C 0.5 D 0.14
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5 pt. Answer from Probability Applications
B 0.75
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10 pt. Question from Probability Applications
William has one quiz each week in science class.
The table gives the probability of having a quiz
on each day of the week. What is the probability
that William will have a quiz Wednesday,
Thursday, or Friday? Express your answer as a
percent. A 17 B 32 C 33 D 68
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10 pt. Answer from Probability Applications
D) 68
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15 pt. Question from Probability Applications
If A and B are independent events such that
P(A)0.14 and P(B)0.28, what is the probability
that both A and B will occur? A 0.0392 B
0.0784 C 0.24 D 0.42
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15 pt. Answer from Probability Applications
A) 0.0392
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20 pt. Question from Probability Applications
An amusement park game has balls numbered from 1
to 52. Two balls are drawn with replacement in
each round of the game. What is the probability
of drawing an even numbered ball the first time
and a multiple of 4 the second time? A 39/52 C
1/8 B ¾ D 17/52
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20 pt. Answer from Probability Applications
C 1/8
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25 pt. Question from Probability Applications
In the United States, of all households have
some kind of pet, and of all households have at
least one child. What is the probability that a
household picked at random will have a pet and
one or more children? A C B D
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25 pt. Answer from Probability Applications
C)
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5 pt. Question fromWild Card
Use a tree diagram to determine the possible meal
combinations given the following choices 3
entrees 5 drinks 2 desserts
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5 pt. Answer fromWild Card
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10 pt. Question fromWild Card
A jar contains 12 quarters and 4 dimes. What is
P(quarter, then dime) if you select the first
coin and replace it before you draw the second
coin?
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10 pt. Answer fromWild Card
P(quarter then dime) P(quarter) 12/16 ¾.
Since you replace the first coin the P(dime)
4/16 because there are still 16 coins in the jar.
The P(quarter then dime) ¾ x 4/16 12/64
3/16.
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15 pt. Question fromWild Card
If A and B are independent events such that P(A)
0.50 and P(B) 0.25. What is the probability
that A and B will occur?
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15 pt. Answer fromWild Card
0.125 P(A) 0.50 and P(B) 0.25 so the P(A and
B) 0.50 x 0.25 0.125
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20 pt. Question fromWild Card
If A and B are independent events such that P(A)
0.50 and P(B) 0.25. What is the probability
that A or B will occur?
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20 pt. Answer fromWild Card
0.75 P(A) 0.50 and P(B) 0.25 so the P(A or
B) 0.50 0.25 0.75
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25 pt. Question fromWild Card
There are 52 cards in a deck. What is the
probability of drawing an ace or a face card?
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25 pt. Answer fromWild Card
P(Ace) 4/52 and P(face card) 12/52, so the
P(Ace or Face Card) 4/52 12/52 16/52 4/13
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Buzzer Shot
The eighth grade dance is being catered. The
caterers offer 4 appetizers, 3 salads, and 2 main
courses for each eighth grade student to choose
for dinner. If the caterers would like 48
different combinations of dinner, how many
desserts should they offer?
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Buzzer Shot Answer
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