Chapter 6
Problems
1.
For a particular group of taxpayers, 25 percent of the returns are audited.
Six
taxpayers are randomly selected from the group.
a.
What is the probability two are audited?
(
29
(
29
(
29 (
29 (
29
2966
.
3164
.
0625
.
15
75
.
25
.
)
2
(
4
2
6
2
=
=
=
C
P
b.
What is the probability two or more are audited?
(
29
(
29
(
29
(
29
[
]
[
]
466
.
3560
.
1780
.
1
75
.
25
.
75
.
25
.
1
)
2
(
5
1
6
1
6
0
6
0
=
+

=
+

=
≥
C
C
X
P
2.
On the average an artist sells two of her works per hour at weekend art shows.
What is the probability of selling least one work this hour?
8647
.
3890
.
7
1
1
!
0
2
1
)
1
(
2
0
=

=

=
≥

e
X
P
3.
There are 18 sales representatives employed at AVC Electronics, ten of which are
women.
If we select four sales representatives at random to attend a conference,
what is the likelihood three of the four are women?
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 Winter '11
 STEVEJOSEPH
 Standard Deviation, Probability theory, sales representatives, Florence Sun Times

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