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

 It is currently 15 Aug 2018, 21:11

### 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

# If y = ax and x = bz, what is y when z = 75?

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

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 47920
If y = ax and x = bz, what is y when z = 75?  [#permalink]

### Show Tags

13 Apr 2018, 01:35
00:00

Difficulty:

65% (hard)

Question Stats:

60% (01:27) correct 40% (01:29) wrong based on 67 sessions

### HideShow timer Statistics

If y = ax and x = bz, what is y when z = 75?

(1) x = 1/2 when z = 60.
(2) y = 2 when z = 50.

_________________
Manager
Joined: 28 Apr 2014
Posts: 52
GMAT 1: 640 Q50 V25
Re: If y = ax and x = bz, what is y when z = 75?  [#permalink]

### Show Tags

13 Apr 2018, 01:41
IMO D
y=ax=a(bz)=abz=75ab
St 1 b can be calculated and hence 75ab
St2 from y and z, we can calculate the value of ab and hence 75ab
Intern
Joined: 08 Feb 2018
Posts: 6
Re: If y = ax and x = bz, what is y when z = 75?  [#permalink]

### Show Tags

16 Apr 2018, 19:26
IMO B
y=ax and x=bz
So y=abz
We need to find y when z=75 so basically we need to find value of y=75ab

Statement(1)- we can only find the value of b from here which is 1/120 but we need a also.hence insufficient

Statement(2)-From this we can find the value of ab which is 1/25.Hence 75ab will be 3.thus y=3 . Sufficient
Hence B

Posted from my mobile device

Posted from my mobile device
Director
Joined: 02 Oct 2017
Posts: 616
Re: If y = ax and x = bz, what is y when z = 75?  [#permalink]

### Show Tags

27 Apr 2018, 23:12
I)y=ax x=bz
y=a/2 no value of y so can't calculate y

II)y=abz
Calculate value of ab when y=2 And z=50
Value of ab is known
Then calculate y when ab and z=75 so
Sufficient

B is answer

Posted from my mobile device
Re: If y = ax and x = bz, what is y when z = 75? &nbs [#permalink] 27 Apr 2018, 23:12
Display posts from previous: Sort by

# If y = ax and x = bz, what is y when z = 75?

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

# Events & Promotions

 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®.