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# Division R of Company Q has 1,000 employees. What is the

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Senior Manager
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Division R of Company Q has 1,000 employees. What is the [#permalink]

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01 Dec 2005, 00:34
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Division R of Company Q has 1,000 employees. What is the average (arithmetic mean) annual salary of the employees at Company Q?

(1)The average annual salary of the employees in Division R is $30,000. (2)The average annual salary of the employees at Company Q who are not in Division R is$35,000.

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01 Dec 2005, 08:58
getzgetzu wrote:
Division R of Company Q has 1,000 employees. What is the average (arithmetic mean) annual salary of the employees at Company Q?

(1)The average annual salary of the employees in Division R is $30,000. (2)The average annual salary of the employees at Company Q who are not in Division R is$35,000.

1) No suff- We do not have info of any other division
2) Not suff - No info on division R/ no idea of no of employees in other divisions

1 and 2 together not suff as we do not know no of people working in other divs

Hence E
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01 Dec 2005, 09:15
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We do not know the total number of employees in the company.

Therefore, (E)
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12 Nov 2006, 11:10
Division R of Company Q has 1,000 employees. What is the average (arithmetic mean) annual salary of the employees at Company Q?
(1) The average annual salary of the employees in Division R is $30,000. (2) The average annual salary of the employees at Company Q who are not in Division R is$35,000.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.

(2) The average annual salary of the employees at Company Q who are not in Division R is $35,000. A IS NOT SUFF B IS NOT SUFF BOTH TOGETHER INSUFF TOO MY ANSWER IS E Senior Manager Joined: 21 Apr 2008 Posts: 269 Location: Motortown Followers: 2 Kudos [?]: 150 [0], given: 0 Re: division [#permalink] ### Show Tags 14 Oct 2008, 16:01 Jcpenny wrote: Division R of Company Q has 1,000 employees. What is the average (arithmetic mean) annual salary of the employees at Company Q? (1) The average annual salary of the employees in Division R is$30,000.
(2) The average annual salary of the employees at Company Q who are not in Division R is $35,000. A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient. B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient. C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient. D. EACH statement ALONE is sufficient. E. Statements (1) and (2) TOGETHER are NOT sufficient. E 1. No Info about other divisions Not Sufficient 2.No Info about division R Not Sufficient Together R=1000 employees with an average of$30,000
2) The average annual salary of the employees at Company Q who are not in Division R is $35,000. stmnt 1 - not suffic., only div. R is known stmnt 2 - not sufic., nothing about div. R is known except the number of employees, which is not enough. let's combine - still not suffic. to answer the question. Therefore, it should be E. Senior Manager Joined: 01 Mar 2009 Posts: 367 Location: PDX Followers: 6 Kudos [?]: 91 [0], given: 24 Re: DS - Averages / Arithematic Mean - OG 12 [#permalink] ### Show Tags 31 Mar 2009, 19:32 Average sal of employess in Q = Total salary of emp in Q/Total no of employees Total no of employees = 1000 + (no of employees not in R ). So both the statements are not sufficient as none of them give the number of employees not in division R. Hence E. -pradeeep _________________ In the land of the night, the chariot of the sun is drawn by the grateful dead SVP Joined: 28 Dec 2005 Posts: 1562 Followers: 3 Kudos [?]: 158 [3] , given: 2 Re: DS - Averages / Arithematic Mean - OG 12 [#permalink] ### Show Tags 02 Apr 2009, 17:32 3 This post received KUDOS Yes, E for me as well. C is the trap answer because it makes you think that since you have the two averages, you know the overall average. Dont forget though that you need to know the total # of employees to determine overall average, which neither of the statements allow to us to deduce. CEO Joined: 17 Nov 2007 Posts: 3586 Concentration: Entrepreneurship, Other Schools: Chicago (Booth) - Class of 2011 GMAT 1: 750 Q50 V40 Followers: 573 Kudos [?]: 3965 [0], given: 360 Re: CAN NOT GET THIS DS QUESTION [#permalink] ### Show Tags 24 Mar 2010, 15:25 We can express the average annual salary of Company Q as: $$S = \frac{S_r * N_r+ S_{not-r}*N_{not-r}}{N_r+N_{not-r}}$$ where - $$S_r$$ - The average annual salary of the employees in Division R - $$S_{not-r}$$ - The average annual salary of the employees who are not in Division R - $$N_r$$ - The number of employees in Division R - $$N_{not-r}$$ - The number of employees who are not in Division R So, we don't know the number of employees who are not in Division R. You can also use huge/tiny numbers to check your answer. If $$N_{not-r}=0$$ or only 1 employee, S = 30K or will be very close to 30K. At the same time, if $$N_{not-r}>>1000$$, S will be very close to 35K. So we need to know at least $$\frac{N_{not-r}}{N_r}$$ ratio. _________________ HOT! GMAT TOOLKIT 2 (iOS) / GMAT TOOLKIT (Android) - The OFFICIAL GMAT CLUB PREP APP, a must-have app especially if you aim at 700+ | PrepGame Manager Joined: 17 Jan 2010 Posts: 212 Schools: UCLA (Anderson) - Class of 2013 GMAT 3: 740 Q49 V41 Followers: 5 Kudos [?]: 56 [0], given: 21 Re: CAN NOT GET THIS DS QUESTION [#permalink] ### Show Tags 24 Mar 2010, 20:09 zest4mba wrote: Division R of Company Q has 1,000 employees. What is the average (arithmetic mean) annual salary of the employees at Company Q ? (1) The average annual salary of the employees in Division R is$30,000.
(2) The average annual salary of the employees at
Company Q who are not in Division R is $35,000. I think if we take 1 and 2 together we could solve this for 30k+35k/2 but the anwer is E as we do not know the number of employees not in R Can someone explain this thanks !! There are two values that we need to know in order to solve this problem. A. the number of employees at Company Q B. The amount of aggregate salary at Company Q From 1, we know that the aggregate salary in Division R is$30,000,000. Not sufficient.
From 2, we know that the annual average salary of people who are not in Division R is $35,000. This does not tell us the aggregate salary outside of Division R nor the number of employees. With the information combined, we still do not have the two crucial pieces of information to solve the problem. Thus, E _________________ Director Joined: 01 Feb 2011 Posts: 755 Followers: 14 Kudos [?]: 124 [0], given: 42 Re: DS - Averages / Arithematic Mean - OG [#permalink] ### Show Tags 02 Jun 2011, 15:41 1. Not sufficient we dont know anything about the average of employees who are not in R and in Q. 2. Not sufficient we dont know anything about the average of division R. and we dont know the number of employees of Q that are not in R. together , we still dont know the number of employees of Q that are not in R. Answer is E. Manager Joined: 22 Aug 2013 Posts: 110 Schools: ISB '15 Followers: 2 Kudos [?]: 31 [0], given: 60 Re: Division R of Company Q has 1000 employees. What is the [#permalink] ### Show Tags 26 Feb 2014, 10:54 Hi, Please add the OA. Thanks. _________________ Veritas Prep - 650 MGMAT 1 590 MGMAT 2 640 (V48/Q31) Please help the community by giving Kudos. Manager Joined: 22 Jan 2014 Posts: 140 WE: Project Management (Computer Hardware) Followers: 0 Kudos [?]: 63 [0], given: 143 Re: Division R of Company Q has 1000 employees. What is the [#permalink] ### Show Tags 26 Feb 2014, 11:23 mrsmarthi wrote: Division R of Company Q has 1000 employees. What is the average annual salary of the employees at Company Q? 1) The average annual salary of the emplouees in Division R is$ 30,000.
2) The average annual salary of the employees at Company Q who are not in Division R is \$ 35,000.

My take is E.

Avg salary = Total salary/Total number of employees.

none of the statements would give the total number of employees. Hence, it cannot be determined even by using both statements.
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Re: Division R of Company Q has 1000 employees. What is the [#permalink]

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27 Feb 2014, 05:36
seabhi wrote:
Hi,

________________
Done: the OA is E.
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Re: Division R of Company Q has 1000 employees. What is the   [#permalink] 27 Feb 2014, 05:36

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