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

 It is currently 18 Jun 2019, 18:22

### 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

### Show Tags

17 Dec 2012, 07:12
3
6
00:00

Difficulty:

5% (low)

Question Stats:

87% (01:23) correct 13% (01:37) wrong based on 1253 sessions

### HideShow timer Statistics

A certain country had a total annual expenditure of $1.2 x 10^12 last year. If the population of the country was 240 million last year, what was the per capita expenditure? (A)$ 500
(B) $1,000 (C)$2,000
(D) $3,000 (E)$5,000
Math Expert
Joined: 02 Sep 2009
Posts: 55670
Re: A certain country had a total annual expenditure of $1.2 x 1 [#permalink] ### Show Tags 17 Dec 2012, 07:16 3 7 Walkabout wrote: A certain country had a total annual expenditure of$1.2 x 10^12 last year. If the population of the country was 240 million last year, what was the per capita expenditure?

(A) $500 (B)$1,000
(C) $2,000 (D)$3,000

### Show Tags

18 Dec 2012, 21:38
$$=\frac{1.2x10^{12}}{240x10^{6}}$$
Notice that 1.2 and 240 we could manipulate to make it to $$120/240$$

$$=\frac{120x10^{10}}{240x10^{6}}=0.5x10^{10-6}=0.5x10^{4}=5,000$$

_________________
Impossible is nothing to God.
Target Test Prep Representative
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 6567
Location: United States (CA)
Re: A certain country had a total annual expenditure of $1.2 x 1 [#permalink] ### Show Tags 21 Jun 2016, 10:22 1 1 Walkabout wrote: A certain country had a total annual expenditure of$1.2 x 10^12 last year. If the population of the country was 240 million last year, what was the per capita expenditure?

(A) $500 (B)$1,000
(C) $2,000 (D)$3,000
(E) $5,000 The key to solving this problem is to accurately translate what is being asked to a mathematical expression. We need to determine the “per capital expenditure”. As an expression this is: (Total annual expenditure)/(Total population)= per capita expenditure The easiest first step is to express 240 million as a number times a power of 10 since the other number is in this format. 240 million = 240,000,000 Since we have a 24 with 7 zeroes we can write this as: 24 x 10^7 Next, we should adjust 1.2 x 10^12 to make it a more usable number in our expression. 1.2 x 10^12 = 120 x 10^10 We now can solve: (Total annual expenditure)/(Total population) (120 x 10^10)/(24 x 10^7) 5 x 10^3 5 x 1,000 = 5,000 Answer E. _________________ # Scott Woodbury-Stewart Founder and CEO Scott@TargetTestPrep.com 122 Reviews 5-star rated online GMAT quant self study course See why Target Test Prep is the top rated GMAT quant course on GMAT Club. Read Our Reviews If you find one of my posts helpful, please take a moment to click on the "Kudos" button. CEO Joined: 12 Sep 2015 Posts: 3783 Location: Canada Re: A certain country had a total annual expenditure of$1.2 x 1  [#permalink]

### Show Tags

28 Aug 2017, 15:32
1
Top Contributor
A certain country had a total annual expenditure of $1.2 x 10^12 last year. If the population of the country was 240 million last year, what was the per capita expenditure? (A)$ 500
(B) $1,000 (C)$2,000
(D) $3,000 (E)$5,000

Let's use a nice rule that says: (ab)/(cd) = (a/c)(b/d)

Per capita expenditure = (total expenditure of country)/(total population of country)
= (1.2 x 10^12)/(240 million)
= (1.2 x 10^12)/(240 x 10^6)
= (1.2 x 10^3 x 10^9)/(240 x 10^6)
= (1.2 x 10^3 x 10^9)/(240 x 10^6)
= (1200 x 10^9)/(240 x 10^6)
= (1200/240)(10^9/10^6)
= (5)(10^3)
= (5)(1000)
= 5000

RELATED VIDEOS

_________________
Test confidently with gmatprepnow.com
Non-Human User
Joined: 09 Sep 2013
Posts: 11393
Re: A certain country had a total annual expenditure of $1.2 x 1 [#permalink] ### Show Tags 28 Oct 2018, 06:06 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 certain country had a total annual expenditure of$1.2 x 1   [#permalink] 28 Oct 2018, 06:06
Display posts from previous: Sort by

# A certain country had a total annual expenditure of \$1.2 x 1

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

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne