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# Of the 800 employees of company X, 70% have been with the

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Manager
Joined: 13 Sep 2006
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Of the 800 employees of company X, 70% have been with the [#permalink]  23 Sep 2006, 15:08
Of the 800 employees of company X, 70% have been with the company for at least 10 years. If y of these 'long-term' members were to retire and no other employee changes were to occur, what value of Y would reduce the percent of 'long term' employees in the company to 60%?

A) 200
B) 160
C) 112
D) 80
E) 56
VP
Joined: 28 Mar 2006
Posts: 1384
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80 unless I am missing something
Manager
Joined: 25 May 2006
Posts: 227
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D) 80

800(0.7)=560

(560-Y)/800=0.6 --> Y=80
_________________

Who is John Galt?

Manager
Joined: 13 Sep 2006
Posts: 212
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Kudos [?]: 1 [0], given: 0

This is exactly why I posted this question...I got 80 too..but.....

80 is wrong. The OA is 200..

Can anyone explain?
Manager
Joined: 13 Sep 2006
Posts: 198
Schools: Olin Business School - Washington University
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Kudos [?]: 18 [0], given: 0

I backsolved this one and got 200. 80 yields 66% long term employees - 480/720 = 66.6%. 200 yields 60% 360/600.
Manager
Joined: 13 Sep 2006
Posts: 198
Schools: Olin Business School - Washington University
Followers: 1

Kudos [?]: 18 [0], given: 0

X & Y, denominator should be (800-Y)...must take into account reduction in total number...
SVP
Joined: 05 Jul 2006
Posts: 1519
Followers: 5

Kudos [?]: 115 [0], given: 39

Of the 800 employees of company X, 70% have been with the company for at least 10 years. If y of these 'long-term' members were to retire and no other employee changes were to occur, what value of Y would reduce the percent of 'long term' employees in the company to 60%?

A) 200 B) 160 C) 112 D) 80 E) 56

560 long timers ...

retired members = y , long timers after retirmemnt of y = 560-y

total employees AFTER RETIRMENT OF Y = 800-y

560-y / 800-y = 0.6

560-y = 480-0.6y thus

80 = 0.4y

thus y = 200

VP
Joined: 28 Mar 2006
Posts: 1384
Followers: 2

Kudos [?]: 19 [0], given: 0

yezz wrote:
Of the 800 employees of company X, 70% have been with the company for at least 10 years. If y of these 'long-term' members were to retire and no other employee changes were to occur, what value of Y would reduce the percent of 'long term' employees in the company to 60%?

A) 200 B) 160 C) 112 D) 80 E) 56

560 long timers ...

retired members = y , long timers after retirmemnt of y = 560-y

total employees AFTER RETIRMENT OF Y = 800-y

560-y / 800-y = 0.6

560-y = 480-0.6y thus

80 = 0.4y

thus y = 200

I get it now
Manager
Joined: 25 May 2006
Posts: 227
Followers: 1

Kudos [?]: 21 [0], given: 0

You are right diegmat.
I can afford to have these mistakes during the real thing.
Thanks..
_________________

Who is John Galt?

Director
Joined: 06 Sep 2006
Posts: 745
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800*.7 - 800*.6= 80. D.
Manager
Joined: 13 Sep 2006
Posts: 198
Schools: Olin Business School - Washington University
Followers: 1

Kudos [?]: 18 [0], given: 0

X & Y - i have seen your other posts - you got skillz to compensate for one little error - believe me.
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