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# What is the median number of employees assigned per project

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Senior Manager
Joined: 05 Jun 2008
Posts: 294
What is the median number of employees assigned per project [#permalink]

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24 Sep 2008, 08:33
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What is the median number of employees assigned per project for the projects at
Company Z?
(1) 25 percent of the projects at Company Z have 4 or more employees assigned to
each project.
(2) 35 percent of the projects at Company Z have 2 or fewer employees assigned to
each project.

IMO ans should be E,

stem 1 insuff
stem 2 insuff
both put together also doesn't help
Manager
Joined: 12 Feb 2008
Posts: 176

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24 Sep 2008, 09:01
1
KUDOS
vivektripathi wrote:
What is the median number of employees assigned per project for the projects at
Company Z?
(1) 25 percent of the projects at Company Z have 4 or more employees assigned to
each project.
(2) 35 percent of the projects at Company Z have 2 or fewer employees assigned to
each project.

IMO ans should be E,

stem 1 insuff
stem 2 insuff
both put together also doesn't help

i also think it is E.
what is the OA?
Director
Joined: 27 Jun 2008
Posts: 527
WE 1: Investment Banking - 6yrs

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24 Sep 2008, 11:15
E for me too.

Question asks for median number of employees

1 & 2 - does not provide you number of employees in Z, they solve to the same equation.

I feel this question perfectly fits - "twin trouble" (I can be wrong though).

http://gmatclub.com/wiki/GMAT_math_tips

-Pawan
Intern
Joined: 24 Mar 2008
Posts: 18

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24 Sep 2008, 11:38
i may be looking at the question wrong, but cant you come to the median of 3 when both 1 and 2 are used together (C)?

Say there are 100 projects, iIf you plot them on a line, the first 25 will have either 1 or 2 employees, the next 40 will have 3 employees and the last 35 will have between 4 and infiniti...so the median will always be 3? It doesnt matter what numbers you use for the first and last group.
SVP
Joined: 17 Jun 2008
Posts: 1507

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25 Sep 2008, 12:28
GoPanthers wrote:
i may be looking at the question wrong, but cant you come to the median of 3 when both 1 and 2 are used together (C)?

Say there are 100 projects, iIf you plot them on a line, the first 25 will have either 1 or 2 employees, the next 40 will have 3 employees and the last 35 will have between 4 and infiniti...so the median will always be 3? It doesnt matter what numbers you use for the first and last group.

I agree. The question is asking for median and both statements are sufficient to arrive at this.
VP
Joined: 05 Jul 2008
Posts: 1379

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26 Sep 2008, 14:29
GoPanthers wrote:
i may be looking at the question wrong, but cant you come to the median of 3 when both 1 and 2 are used together (C)?

Say there are 100 projects, iIf you plot them on a line, the first 25 will have either 1 or 2 employees, the next 40 will have 3 employees and the last 35 will have between 4 and infiniti...so the median will always be 3? It doesnt matter what numbers you use for the first and last group.

How did you determine that the remaining 40% projects will have 3 employees? Why cant they be towards the far end of the graph and have 5 employees or more?
Intern
Joined: 24 Aug 2008
Posts: 8

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27 Sep 2008, 09:08
1
KUDOS
icandy wrote:
GoPanthers wrote:
i may be looking at the question wrong, but cant you come to the median of 3 when both 1 and 2 are used together (C)?

Say there are 100 projects, iIf you plot them on a line, the first 25 will have either 1 or 2 employees, the next 40 will have 3 employees and the last 35 will have between 4 and infiniti...so the median will always be 3? It doesnt matter what numbers you use for the first and last group.

How did you determine that the remaining 40% projects will have 3 employees? Why cant they be towards the far end of the graph and have 5 employees or more?

Putting both statements together

Range 1 : 0-2 : 25
Range 2 : 4-Infinity : 35

The only range of numbers that is not covered is (2,4) - which can be just 3
The 50th percentile falls in this range, and therefore the median has to be 3
Re: DS-Stat   [#permalink] 27 Sep 2008, 09:08
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