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GMAT Quantitative Reasoning Practice Test 8
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© examsnet.com
Question : 55
Total: 76
Number of People
2x
x
2x
4
1
Number of Hours
0
1
5
10
25
For each of the number of hours shown in the second row of the table, the first row shows the number of members of a certain sales team who spent that number of hours with customers last week. For example, the table shows that 4 team
members spent 10 hours each with customers last week. If every member of the team is counted in the table, how many members does the team have?
(1) The average (arithmetic mean) number of hours spent with customers last week was 4 per team member.
(2) Half of the members of the team spent 1 hour or less each with customers last week.
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
Validate
Solution:
(1) We have the total hours
(
0
+
1
+
5
+
10
+
25
)
of 41 and an average of 4 .
41
4
=
10
(2) half the team
(
2
x
+
x
)
spent 1 hour or less with a customer while the other half
(
2
x
+
4
+
1
)
spent more than an hour.
2
x
+
x
=
2
x
+
4
+
1
,
x
=
5
=
half the team.
© examsnet.com
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