Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized for You

we will pick new questions that match your level based on your Timer History

Track Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

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

Show Tags

01 Dec 2005, 00:34

1

This post received KUDOS

3

This post was BOOKMARKED

00:00

A

B

C

D

E

Difficulty:

5% (low)

Question Stats:

74% (00:56) correct
26% (00:51) wrong based on 342 sessions

HideShow timer Statistics

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.

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

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.

From A we can work out that the overall salary cost for division A is $3m INSUFF
From b we cannot really tell much, since we don't know how many employees remain INSUFF

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.

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 non R = average of $35000, but # of employees ???

[quote="Jcpenny"]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.

Q = R+S = 1000+S what is TOTAL SALARY / 1000+(Q-1000)

TOTAL SALARY = TOTAL SALARY R + TOTAL SALARY S

FROM ONE

R TOTAL SALARY = 30,000*1000 ..........INSUFF

FROM 2

TOTAL SALARY S = (s)*35,000........

E

AND I HAVE TO GO TO SLEEP AS I HAVE AGRESSIVELY STARTED SILLY MISTAKES

cant we just add both averages together and then divide over 2? i know it´s a stupid question but pls guys be so kind and tell me logically why not

thank you

No. That cannot be done. Check the following.

if total employees of division A is x1 and total salary is s1 then average = s1/x1. If rest of employees is x2 and total salary of these is s2 then average = s2/x2.

Sum of the two averages = (s1/x1) + (s2/x2).

However, average at the company level = (s1+s2)/(x1+x2) and this is not the same as (s1/x1) + (s2/x2).

Its clearly (E) as no indication of distribution of number of employees among sector R and rest of the company. Guessing whats the level of this question ? Seems really easy one.

Re: DS - Averages / Arithematic Mean - OG 12 [#permalink]

Show Tags

31 Mar 2009, 19:10

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.

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.

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.
_________________

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.

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.
_________________

Version 8.1 of the WordPress for Android app is now available, with some great enhancements to publishing: background media uploading. Adding images to a post or page? Now...

“Keep your head down, and work hard. Don’t attract any attention. You should be grateful to be here.” Why do we keep quiet? Being an immigrant is a constant...

“Keep your head down, and work hard. Don’t attract any attention. You should be grateful to be here.” Why do we keep quiet? Being an immigrant is a constant...