Simple Events Worksheets Page 5
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about 130 households
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31–33. See margin.
31–33. See margin.
34. See Ch. 9
Answer Appendix.
34. See Ch. 9
Answer Appendix.
H.O.T.
Problems
REASONING
A leap year has 366 days and occurs in non-century years that
31.
are evenly divisible by 4. The extra day is added as February 29th.
Determine whether each probability is 0 or 1. Explain your reasoning.
P(there will be 29 days in February in 2032)
a.
P(there will be 29 days in February in 2058)
b.
CHALLENGE
A bag contains 6 red marbles, 4 blue marbles, and 8 green
32.
marbles. How many marbles of each color should be added so that the total
number of marbles is 27, but the probability of randomly selecting one
marble of each color remains unchanged? Explain your reasoning.
Which One Doesn’t Belong?
Identify the pair of probabilities that does not
33.
represent probabilities of complementary events. Explain your reasoning.
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_
_
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3
2
3
6
1
,
0.625,
,
0.33, 0.44
5
5
8
8
4
Marissa has 5 black T-shirts, 2 purple T-shirts, and
MATH
34.
1 orange T-shirt. Without calculating, determine whether each of the
following probabilities is reasonable if she randomly selects one T-shirt.
Explain your reasoning.
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_
_
1
4
1
P(black T-shirt) =
P(orange T-shirt) =
P(purple T-shirt) =
a.
b.
c.
3
5
4
A bag contains 8 blue marbles,
35.
What is the
36.
1
5
15 red marbles, 10 yellow marbles,
probability of the
0
2
and 3 brown marbles. If a marble
spinner landing on a
7
6
is randomly selected, what is the
number less than 3? G
3
4
probability that it will be brown? C
F 25%
H 50%
−
A 0.27
C 0.08
3
G 37.5%
J 75%
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3
B 11%
D
8
RAIN
The scatter plot shows the relationship between
Rainfall and
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Lawn Growth
rainfall and lawn growth. Why might the graph be
y
misleading?
(Lesson 8-9)
PARKS
A researcher randomly selected 100 households near
38.
a city park. Of these, 26% said they visit the park daily. If
there are 500 households near the park, about how many
visit it daily?
(Lesson 8-8)
x
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2
3
4
0
Amount of Rain (in.)
PREREQUISITE SKILL
Write each fraction in simplest form.
(Lesson 4-4)
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6
15
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18
39.
40.
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43.
6
8
30
16
32
464
Chapter 9 Probability
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