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

It is currently 27 Jun 2019, 03:51

Close

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

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

Close

Request Expert Reply

Confirm Cancel

The ratio of x to y to z is 3 : 4 : 12. If the ratio is changed so

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

Hide Tags

 
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 55804
The ratio of x to y to z is 3 : 4 : 12. If the ratio is changed so  [#permalink]

Show Tags

New post 28 Dec 2017, 21:42
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

80% (01:49) correct 20% (01:58) wrong based on 94 sessions

HideShow timer Statistics


examPAL Representative
User avatar
P
Joined: 07 Dec 2017
Posts: 1072
Re: The ratio of x to y to z is 3 : 4 : 12. If the ratio is changed so  [#permalink]

Show Tags

New post 29 Dec 2017, 04:53
Bunuel wrote:
The ratio of x to y to z is 3 : 4 : 12. If the ratio is changed so that the ratio of x to z is doubled and the ratio of y to z is halved which of the following is the new ratio?

A. 6 : 2 : 24
B. 6 : 1 : 24
C. 6 : 1 : 12
D. 3 : 1 : 6
E. 3 : 8 : 6


As all possible options are in front of us, we'll check the answers.
This is an Alternative approach.

(A) the ratio of x:z is 6:24 = 3:12, the same as the original. No!
(B) the ratio of x:z is 6:24 = 3:12, the same as the original. No!
(C) the ratio of x:z is 6:12, twice the original. Good! The ratio of y:z is 1:12, one fourth of the original. No!
(D) the ratio of x:z is 3:6=6:12, twice the original. Good! The ratio of y:z is 1:6=2:12, one half of the original. Yes!

(D) is our answer, there is no need to test (E) as well.
_________________
Intern
Intern
avatar
B
Joined: 24 Aug 2014
Posts: 2
Re: The ratio of x to y to z is 3 : 4 : 12. If the ratio is changed so  [#permalink]

Show Tags

New post 23 Sep 2018, 03:41
At first double x to double x:z ratio and then halve y to make the y:z ratio 1/2 of original.
We get 6:2:12 which gets reduced to 3:1:6....making option D the correct answer,
CEO
CEO
User avatar
V
Joined: 12 Sep 2015
Posts: 3787
Location: Canada
Re: The ratio of x to y to z is 3 : 4 : 12. If the ratio is changed so  [#permalink]

Show Tags

New post 23 Sep 2018, 09:08
1
Top Contributor
Bunuel wrote:
The ratio of x to y to z is 3 : 4 : 12. If the ratio is changed so that the ratio of x to z is doubled and the ratio of y to z is halved which of the following is the new ratio?

A. 6 : 2 : 24
B. 6 : 1 : 24
C. 6 : 1 : 12
D. 3 : 1 : 6
E. 3 : 8 : 6


GIVEN: x : y : z = 3 : 4 : 12

The ratio is changed so that the ratio of x to z is doubled
We get x : y : z = 6 : 4 : 12

The ratio is changed so that the ratio of y to z is halved
We get x : y : z = 6 : 2 : 12

We can simplify 6 : 2 : 12 by dividing all three parts by 2.
We get: 3 : 1 : 6

Answer: D
_________________
Test confidently with gmatprepnow.com
Image
GMAT Club Bot
Re: The ratio of x to y to z is 3 : 4 : 12. If the ratio is changed so   [#permalink] 23 Sep 2018, 09:08
Display posts from previous: Sort by

The ratio of x to y to z is 3 : 4 : 12. If the ratio is changed so

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


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