What is the ratio of x:y:z?
(1) xy = 14
(2) yz = 21
OA E
Source: Official Guide
5-Day Free Trial
5-day free, full-access trial TTP
Available with Beat the GMAT members only code
MORE DETAILS
What is the ratio of x:y:z?
This topic has expert replies
-
BTGmoderatorDC
- Moderator
- Posts: 7187
- Joined: Thu Sep 07, 2017 4:43 pm
- Followed by:23 members
GMAT/MBA Expert
-
Brent@GMATPrepNow
- GMAT Instructor
- Posts: 16207
- Joined: Mon Dec 08, 2008 6:26 pm
- Location: Vancouver, BC
- Thanked: 5254 times
- Followed by:1268 members
- GMAT Score:770
Timer
00:00
Your Answer
A
B
C
D
E
Global Stats
Target question: What is the ratio of x:y:z?BTGmoderatorDC wrote:What is the ratio of x:y:z?
(1) xy = 14
(2) yz = 21
Statement 1: xy = 14
In information about z
Statement 1 is NOT SUFFICIENT
Statement 2: yz = 21
In information about x
Statement 2 is NOT SUFFICIENT
Statements 1 and 2 combined
There are several values of x, y and z that satisfy BOTH statements. Here are two:
Case a: x = 2, y = 7 and z = 3. In this case, the answer to the target question is the ratio of x:y:z = 2:7:3
Case b: x = 14, y = 1 and z = 21. In this case, the answer to the target question is the ratio of x:y:z = 14:1:21
Since we cannot answer the target question with certainty, the combined statements are NOT SUFFICIENT
Answer: E
Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
