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Each employee on a certain task force is either a manager or

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Manager
Manager
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Joined: 03 Jul 2005
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Each employee on a certain task force is either a manager or [#permalink] New post 12 Nov 2006, 22:37
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Each employee on a certain task force is either a manager or a director. What percent of the employees on the task force are directors?

A) The average (arithmetic mean) salary of the managers on the task force is $5,000 less than the average salary of all employees on the task force

B) The average (arithmetic mean) salary of the directors on the task force is $15,000 greater than the average salary of all employees on the task force.

Could you work how to finish the question to prove what the answer is.
VP
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 [#permalink] New post 13 Nov 2006, 00:45
guessing E.

i can't working out the answer.
Director
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 [#permalink] New post 13 Nov 2006, 00:57
Hm...

Taking both statements together....

Sum of wages =S (all empoyees) Sd(directors) Sm(managers)
# of managers = m
# of directors = d (need to find this)
# of all employees = a (need to find this)
the average salary = y

Average salary of all employees: S/a=y

from 1) Sm/m=y-5
from 2) Sd/d=y+15

Did no detailed calculations, however feel that the answer is E.... :)
VP
VP
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 [#permalink] New post 13 Nov 2006, 01:01
all we need is to find the ratio m/d, but it seems not possible.
Manager
Manager
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Posts: 195
Location: City
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 [#permalink] New post 13 Nov 2006, 03:50
Apparently the OA is C, but I cannot see how!!
  [#permalink] 13 Nov 2006, 03:50
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