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by vishubn » Sat Dec 13, 2008 5:31 am
A certain company currently has how many employees?
(1) If 3 additional employees are hired by the company and all of the present employees remain, there will be at least 20 employees in the company.
(2) If no additional employees are hired by the company and 3 of the present employees resign, there will be fewer than 15 employees in the company.


Vishu

My approach

let n be the number of employees

A)n+3 >= 20

n>=23
Insuff

B) n-3<15
n<18

I choose E !! but OA is C

Comments??

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Source: — Data Sufficiency |
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by vishubn » Sat Dec 13, 2008 5:32 am
OOPSS ! holy mother of god !

I found out the mistake

:(

I keep the post open ,no harm right :D

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Re: Employees

by parallel_chase » Sat Dec 13, 2008 5:36 am
Statement I

n+3 >= 20

n >= 17

Statement II
n-3<15
n < 18

Combining I & II

17 =< n < 18

therefore, n = 17

Hence C.

You messed up the inequality sign for statement II otherwise everything was fine.

Hope this helps.
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by NicoFalcon » Sat Dec 13, 2008 5:38 am
Yep, doing my calculus in a hurry is one of the things that hurts me most too...

So... n?

(1) n+3>=20

So n>=17 INSUFF

(2) n-3<15

So n<18 INSUFF

(1)+(2) 17=<n<18. SUFF (assuming employees are integer xD)

Answer C
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by mcdesty » Sat Jul 19, 2014 9:21 pm
See Image below.
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I am experienced - I have tutored calculus and linear algebra for over two years.
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by GMATinsight » Sat Jul 19, 2014 9:29 pm
vishubn wrote:A certain company currently has how many employees?
(1) If 3 additional employees are hired by the company and all of the present employees remain, there will be at least 20 employees in the company.
(2) If no additional employees are hired by the company and 3 of the present employees resign, there will be fewer than 15 employees in the company.
If anyone is watching this thread then the appropriate inferences from statements

If Present employees = X
Statement 1) X+3>or= 20 i.e. X >or=20-3 i.e. X >or= 17NOT SUFFICIENT

Statement 1) X-3<15 i.e. X <15+3 i.e. X < 18 NOT SUFFICIENT

Combining the two statements

X >or=17 Also X < 18
i.e. X = 17

Answer: Option C
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