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DS-Aithmetic Mean

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Director
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Joined: 03 Sep 2006
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DS-Aithmetic Mean [#permalink] New post 24 Jun 2007, 20:00
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Pl. exp.
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Director
Director
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Joined: 03 Sep 2006
Posts: 893
Followers: 6

Kudos [?]: 86 [0], given: 33

Re: DS-Aithmetic Mean [#permalink] New post 24 Jun 2007, 20:19
Himalayan wrote:
LM wrote:
Pl. exp.

C should give answer.

Could you please show the equations with corresponding equations?
Director
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Re: DS-Aithmetic Mean [#permalink] New post 25 Jun 2007, 06:48
LM wrote:
Himalayan wrote:
LM wrote:
Pl. exp.

C should give answer.

Could you please show the equations with corresponding equations?


managers = m
managers' avg salary = x

directors = d
directors avg salary = y

from 1:
x + 5000 = (xm+dy) / (m+d)
y - x = 5000(m+d)/d

from 2:
y - 15000 = (xm+dy) / (m+d)
y - x = 15000(m+d)/m

from 1 and 2:
5000 (m+d)/d = 15000 (m+d)/m
m = 3d

so C
Re: DS-Aithmetic Mean   [#permalink] 25 Jun 2007, 06:48
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