GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 14 Dec 2018, 11:27

### GMAT Club Daily Prep

#### 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

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

## Events & Promotions

###### Events & Promotions in December
PrevNext
SuMoTuWeThFrSa
2526272829301
2345678
9101112131415
16171819202122
23242526272829
303112345
Open Detailed Calendar
• ### Typical Day of a UCLA MBA Student - Recording of Webinar with UCLA Adcom and Student

December 14, 2018

December 14, 2018

10:00 PM PST

11:00 PM PST

Carolyn and Brett - nicely explained what is the typical day of a UCLA student. I am posting below recording of the webinar for those who could't attend this session.
• ### Free GMAT Strategy Webinar

December 15, 2018

December 15, 2018

07:00 AM PST

09:00 AM PST

Aiming to score 760+? Attend this FREE session to learn how to Define your GMAT Strategy, Create your Study Plan and Master the Core Skills to excel on the GMAT.

# A sum of money is invested at simple interest, partly at 4% and remain

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 51215
A sum of money is invested at simple interest, partly at 4% and remain  [#permalink]

### Show Tags

02 Jul 2017, 01:31
00:00

Difficulty:

35% (medium)

Question Stats:

81% (02:52) correct 19% (03:16) wrong based on 49 sessions

### HideShow timer Statistics

A sum of money is invested at simple interest, partly at 4% and remaining at 7% annual rates of interest. After two years, the total interest obtained was $2100. If the total investment is$18000, what was the sum of money invested at 4% annual rate of interest?

(A) $5500 (B)$6000
(C) $7000 (D)$10500
(E) $11000 _________________ Director Joined: 04 Dec 2015 Posts: 730 Location: India Concentration: Technology, Strategy Schools: ISB '19, IIMA , IIMB, XLRI WE: Information Technology (Consulting) Re: A sum of money is invested at simple interest, partly at 4% and remain [#permalink] ### Show Tags 02 Jul 2017, 01:43 1 Bunuel wrote: A sum of money is invested at simple interest, partly at 4% and remaining at 7% annual rates of interest. After two years, the total interest obtained was$2100. If the total investment is $18000, what was the sum of money invested at 4% annual rate of interest? (A)$5500
(B) $6000 (C)$7000
(D) $10500 (E)$11000

Total investment $$= 18000$$

Let the money invested with 4% interest $$= x$$

Money invested with 7% interest $$= 18000 - x$$

$$2100 = \frac{4*x*2}{100} + \frac{(18000-x)*7*2}{100}$$

$$\frac{8x + 252000 - 14x}{100} = 2100$$

$$-6x + 252000 = 210000$$

$$6x = 252000 - 210000 = 42000$$

$$x = \frac{42000}{6} = 7000$$

Manager
Joined: 27 Mar 2016
Posts: 51
Re: A sum of money is invested at simple interest, partly at 4% and remain  [#permalink]

### Show Tags

02 Jul 2017, 06:28
let sum of money invested at 4% be x and at 7% be 18000-x
(4*x*2)/100+((18000-x)*2*7)/100=2100
8x-14x+14*18000=210000
6x=42000
x=7000
hence C
Manager
Joined: 06 Nov 2016
Posts: 103
Location: India
GMAT 1: 710 Q50 V36
GPA: 2.8
Re: A sum of money is invested at simple interest, partly at 4% and remain  [#permalink]

### Show Tags

03 Jul 2017, 10:11
money invested at 4% is x
money invested at 7% is 18,000 - x

Therefore after two years, interest is:

x*4*2/100 + (18,000- x)*7*2/100 = 2100

8x + 252000-14x = 210000
6x = 42000
x is 7000 or Option C
Non-Human User
Joined: 09 Sep 2013
Posts: 9159
Re: A sum of money is invested at simple interest, partly at 4% and remain  [#permalink]

### Show Tags

30 Jul 2018, 03:34
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
Re: A sum of money is invested at simple interest, partly at 4% and remain &nbs [#permalink] 30 Jul 2018, 03:34
Display posts from previous: Sort by

# A sum of money is invested at simple interest, partly at 4% and remain

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.