LESSON
12.3
DATE
NAME
For use with
psges TlB-lSl
Spinning a Spinner You have at? equally likely chance of spinning
any value on the spinner. Find the probability of spinning the given
event.
1. a shaded region
2. a factor of 27
3. a number less than 6 or a shaded region
4. an even number or perfect square
5. a prime number
6. a two-digit number
Choosing Marbles A. jar contains 5 red marbles, 3 green marbles, 2 yellow
marbles, and 1 blue marble. Find the probability of randomly drawing the given
type of marble.
7. a yellow marble
8. a blue marble
9. a green or yellow marble
10. a red or yeUow marble
School Mascot In order to choose a mascot for a new school, 2755 students
were surveyed: 896 chose a falcon, 937 chose a ram, and 842 chose a panther.
The remaining students did not vote. A student is chosen at random.
11. What is the probability that the student's choice was a panther?
12. What is the probabilitj' that the student's choice was not a ram?
13. What is the probabihry that the student's choice was either a falcon or a
ram?
Hitting a Star
In Ejierelses 14-18, use the following Information.
You are throwing a dart at thie square shown at the right. Assume that
the dart is equally likely to land at aiiy point in the square. The square
is 2 inches by 2 inches. Each stai- has an area of 0.01 square inch.
14. The dart has landed inside the square. What is the probability that
it hit a star?
w w >r
15^ The dart has landed inside the square. What is the probability that
it hit a star in the top three rows?
^ i a ) The dart has landed inside the square. What is the probability that
it hit one of the four comer stars?
Copyright © McDougal Litteii Inc.
All rights resen/ed.
^
^ -
^
w
^
Algebra 2
Chapter 12 Resource Book
^
LESSOii
DATE
NAME
Choosing Numbers You have an equally likely chance of choosing any integei from the set {1, 2, 3, 4, 5, 6. 7,8,9, IQ, LI, 12}. Find the probability of tlie
given event.
1. A n even number is chosen.
2. A prime number is chosen.
3. A multiple of 3 is chosen.
4. A two-digit number is chosen.
Farm Animals Your cousin lives osi a small farm. She is a member of the
4-H Club and is showing nine animals at the county fair. Two of her animals
won a blue ribbon (1st place), one won a red ribbon (2nd place), and three won
white ribbons (3rd place). You do not know which animals won which prizes.
You choose one of your cousin's aiiiraals at random.
5. What is the probability that the animal won a 1 st place ribbon?
6. What is the probabilit)' that the animal ¥/OB a ribbon?
7. What is the probability that tl>e animal won a red or white ribbon?
Live Births
In Ejcereises 8-1 tt, ase the f o l l o w i n g information.
Of all live births in the United States in 1996, 12.9% of the mothers were
teenagers, 51.8% v/ere in their twecties, 33.4% were in their thirties, and the
rest were in their forties. Suppose a motlier is chosen at random.
8. What is the probability tliat the mother gave birth in her twenties?
9. What is the probability that the mother gave birth in her twenties or
thirties?
10. What is the probability that the mother gave birth in her forties?
11. Choosing Coins You have 8 pennj.es in your pocket dated 1972, 1978,
1979, 1985,1989, 1991, 1993, and 1999. You take the coins out of your
pocket one at a time. What is the probability that they are taken out in
order by date?
12. Geometry Find the probability that a dart thrown at the given target will
hit the shaded region. Assume the dart is equally likely to hit any point
inside the target.
7
Algebra 2
Chapter 1 2 Rssounca B o o k
Copyright © McDougal Littell Inc.
All rights reserved.
LESSON
12.3
NAME
DATE
Practice A
For use with pages 716-722
Spinning a Spinner You have an equally Ukely chance of spinning
any value on the spinner. Find the probability of spinning the given
event.
1. a shaded region
,>'^;30 2-
^
a factor of 27
-)-c^
O i L\)
3. a number less than 6 or a shaded region I
4. an even number or perfect square
5. a prime number Q ^ I Q
^ ^ j ^
6. a two-digit number ( 3
Choosing Marbles A jar contains 5 red marbles, 3 green marbles, 2 yellow
marbles, and 1 blue marble. Find the probabihty of randomly drawing the given
type of marble.
^
Z/i \ I
7. a yellow marble ^ loZ8- a blue m a r b l i ^ ,
9. a green or yellow marble " * ^^^^
^jT^
»
'\0. a red or yellow marble
(1
(J/^C^^
1
School Mascot In order to choose a mascot for a new school,'^55 s t i i d e ^
were siu^eyed: 896 chose a falcon, 937 chose a ram, and 842 chosea panther.
The remaining students did not vote. A student is chosen at random.
,
11. What is the probabihty that the student's choice was a panther?
cA-^''
12. What is the probabihty that the student's choice was not a r a m ? ^
(^LiO
13. What is the probabihty that the student's choice was either a falcon or a
ram?
^W+^l
^^^^
Hitting a Star
O.iJiK)
In Exercises 14-16, use the f o l l o w i n g i n f o r m a t i o n .
You are throwing a/dart at the square shown/at the right. Assume'that
the dart is equally/likely to land at any poim in the square. The/square
is 2 inches by 2 inches. Each star has a n ^ e a of 0.01 square iWch.
14. The dart>oas landed inside the scpare. What is the profcabiUty that
ithita§((ar?
^VA2}0
"C'^n^
(l5^ The dart has landed inside the; square. What is the ''pro^^ility that
it hit/a star in the top three pows?
[16 J Thar dart has landed insid^the square. What i ^ 'the probability that
it mt one of the four coaier stars?
Copyright© McDougal Littell Inc.
All rights reserved.
^AAJ&.
Algebra 2
Chapter 12 Fiesource Book
45
LESSON
12.3
YJUA
NAME
DATE
Practice B
For'^use with pages 716-722
Choosing Numbers You have an equally likely chance of choosing any integer from the set {1, 2, 3,4, 5, 6, 7,8,9, 10,11,12}. Find the probabiHty of tlie
given event.
:. A prime number is chosen.O• ^ ^
1. A n even number is chosen.
3 . Amultipleof 3 ischosen. ^
2)^^
4. A two-digit number is chosen.
Farm Animals Your cousin lives on a small farm. She is a member of the
4-H Club and is showing nine animals at the county fair. Two of her animals
won a blue ribbon (1st place), one won a red ribbon (2nd place), and three won
white ribbons (3rd place). You do not know which animals won which prizes.
You choose one of your cousin's aiiJmals at random.
5. What is the probability that the anim,5i won a 1 st place ribbon? Q ^ 2.26. What is the probability that the animal ¥;OB a ribbon? (J ,(^Plj!^
O /.^
/ \
Lo
7. What is the probability that tlie animal won a red or white ribbon? Q /J^/J^Z^
live Births
In Exercises S-10, u s e t h e following information.
Of all live births in the United States in 1996, 12.9% of the mothers were
teenagers, 51.8% were in their twenties, 33.4% were in their thirties, and the
rest were in thei| fgrtips. Suppose a mother is chosen at random.
8.
WodX
is the probability that the mother gave birth in her twenties?
^
,^
|
^
9. What is the probability that the mother gave birth in her twenties o r ^
10. What is the probability tJiat the mother gave birth in her forties?
Q
11. Choosing Coins You have 8 pennies m your pocket dated 1972, 1978,
1979, 1985, 1989, 1991, 1993, and 1999. You take the coins out of your
pocket one at a time. What is the probability that they are taken out in
order by date?
'ds^^
K ( 0~ ^
\
Wo
12. Geometry Find the probability that a dart throvv'n at the given target will
hit the shaded region. Assume the dart is equally likely to hit any point
inside the target.
^
/ /I i
erf g ^ U A A i l - ^ n
4 ^
46
Algebra 2
Chapter 12 Resource B o o k
Copyright© McDouga! Littell Inc.
All rights reserved.