The inflation index for the year 1989 relative to the year : GMAT Data Sufficiency (DS)
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 23 Jan 2017, 14:22

### 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
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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# The inflation index for the year 1989 relative to the year

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

### Hide Tags

Manager
Joined: 02 Dec 2012
Posts: 178
Followers: 5

Kudos [?]: 2338 [0], given: 0

The inflation index for the year 1989 relative to the year [#permalink]

### Show Tags

26 Dec 2012, 03:34
6
This post was
BOOKMARKED
00:00

Difficulty:

5% (low)

Question Stats:

73% (02:10) correct 27% (01:09) wrong based on 544 sessions

### HideShow timer Statistics

The inflation index for the year 1989 relative to the year 1970 was 3.56, indicating that, on the average, for each dollar spent in 1970 for goods, $3.56 had to be spent for the same goods in 1989. If the price of a Model K mixer increased precisely according to the inflation index, what was the price of the mixer in 1970 ? (1) The price of the Model K mixer was$102.40 more in 1989 than in 1970.
(2) The price of the Model K mixer was $142.40 in 1989. [Reveal] Spoiler: OA Math Expert Joined: 02 Sep 2009 Posts: 36618 Followers: 7100 Kudos [?]: 93564 [2] , given: 10578 Re: The inflation index for the year 1989 relative to the year [#permalink] ### Show Tags 26 Dec 2012, 03:38 2 This post received KUDOS Expert's post The inflation index for the year 1989 relative to the year 1970 was 3.56, indicating that, on the average, for each dollar spent in 1970 for goods,$3.56 had to be spent for the same goods in 1989. If the price of a Model K mixer increased precisely according to the inflation index, what was the price of the mixer in 1970 ?

Given that (price in 1989) = (price in 1970)*3.65.

(1) The price of the Model K mixer was $102.40 more in 1989 than in 1970 --> (price in 1989) = (price in 1970) + 102.4, We have two distinct linear equations with two unknowns, thus we can solve for both. Sufficient. (2) The price of the Model K mixer was$142.40 in 1989 --> (price in 1989) = 142.4 --> (price in 1970) = (price in 1989)/3.65 = 142.4/3.65. Sufficient.

Answer: D.
_________________
GMAT Club Legend
Joined: 09 Sep 2013
Posts: 13522
Followers: 577

Kudos [?]: 163 [0], given: 0

Re: The inflation index for the year 1989 relative to the year [#permalink]

### Show Tags

03 Nov 2014, 01:34
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.
_________________
Director
Joined: 23 Jan 2013
Posts: 579
Schools: Cambridge'16
Followers: 1

Kudos [?]: 42 [0], given: 40

The inflation index for the year 1989 relative to the year [#permalink]

### Show Tags

03 Nov 2014, 21:29
S1 suggests proportion: 1/3.56=x/x+102.40, so we can easily find variable x. Sufficient

S2 suggests another proportion: 1/3.56=x/142.40, we can find x too. Sufficient

PS. Checking gives us x=40 in both statements, but we do not need counting value in this type of DS

D
Intern
Joined: 22 Oct 2014
Posts: 28
Followers: 0

Kudos [?]: 7 [0], given: 79

Re: The inflation index for the year 1989 relative to the year [#permalink]

### Show Tags

23 Nov 2014, 12:26
Bunuel wrote:
Given that (price in 1989) = (price in 1970)*3.65.

(1) The price of the Model K mixer was $102.40 more in 1989 than in 1970 --> (price in 1989) = (price in 1970) + 102.4, We have two distinct linear equations with two unknowns, thus we can solve for both.Sufficient. (2) The price of the Model K mixer was$142.40 in 1989 --> (price in 1989) = 142.4 --> (price in 1970) = (price in 1989)/3.65 = 142.4/3.65. Sufficient.

Answer: D.

Hi,
I didn't understand this part, is there any theory behind two distinct linear equation with two unknowns?
Please feel free to share any resources
Manager
Joined: 10 May 2014
Posts: 141
Followers: 0

Kudos [?]: 68 [0], given: 28

Re: The inflation index for the year 1989 relative to the year [#permalink]

### Show Tags

09 Dec 2015, 13:26
Let´s call
a = 1970
b = 1989

Given information
b/a = 3.56/1

Statement 1
b - a = 102.4
We have 2 different, linear equations. Therefore, we can solve. Sufficient.

Statement 2
b = 142.4
We have 2 different, linear equations. Therefore, we can solve. Sufficient.

OA = D
_________________

Consider giving me Kudos if I helped, but don´t take them away if I didn´t!

What would you do if you weren´t afraid?

Director
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 516
Location: United States (CA)
Followers: 20

Kudos [?]: 195 [0], given: 2

Re: The inflation index for the year 1989 relative to the year [#permalink]

### Show Tags

19 May 2016, 06:53
Walkabout wrote:
The inflation index for the year 1989 relative to the year 1970 was 3.56, indicating that, on the average, for each dollar spent in 1970 for goods, $3.56 had to be spent for the same goods in 1989. If the price of a Model K mixer increased precisely according to the inflation index, what was the price of the mixer in 1970 ? (1) The price of the Model K mixer was$102.40 more in 1989 than in 1970.
(2) The price of the Model K mixer was $142.40 in 1989. Solution: We are given that the inflation for the year 1989 relative to the year 1970 was 3.56, which means the price of an item in 1989 was 3.56 times the price of the same item in 1970. We are also given that the price of a Model K mixer increased according to the given inflation index, and from that we must determine the price of the mixer in 1970. If we let x = the price of the Model K mixer in 1970, then the price of the Model K mixer in 1989 is 3.56x. Thus, we must determine the value of x. Statement One Alone: The price of the Model K mixer was$102.40 more in 1989 than in 1970.

Using the information in statement one, we can create the following equation:

3.56x = 102.40 + x

We see that we have enough information to determine the value of x. Statement one alone is sufficient to answer the question. We can eliminate answer choices B, C, and E.

Statement Two Alone:

The price of the Model K mixer was \$142.40 in 1989.

Using the information in statement two we can create the following equation:

3.56x = 142.40

We see that we have enough information to determine the value of x.

Answer: D
_________________

Jeffrey Miller
Scott Woodbury-Stewart
Founder and CEO

Re: The inflation index for the year 1989 relative to the year   [#permalink] 19 May 2016, 06:53
Similar topics Replies Last post
Similar
Topics:
In what year was Edward born? 1 22 Aug 2016, 02:03
The inflation index for the year 1989 relative to the year 1 24 Dec 2012, 20:13
5 The consumer price index in Zeropia in 2009 relative to the 3 08 Nov 2012, 15:21
4 At the beginning of the year, the Finance Committee and the 8 28 Apr 2012, 21:11
6 In what year was Ellen born? 5 17 Mar 2012, 17:51
Display posts from previous: Sort by

# The inflation index for the year 1989 relative to the year

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

 Powered by phpBB © phpBB Group and phpBB SEO 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®.