grandh01 wrote:G, P, and S are animal species.
What is the average life span, in year,
of S ?
(1) The average life span of S is
twice that of P and
4/5 that of G.
(2) The average life span of G is 30
years longer than that of P and 10
years longer than that of S.
Statement 1: The average life span of S is twice that of P and 4/5 that of G.
To determine the ratio, PLUG IN.
If G=5, then S = (4/5)5 = 4.
Since S = 2P, if S=4, then P=2.
Thus, P : S : G = 2:4:5.
No way to determine the value of S.
INSUFFICIENT.
Statement 2: The average life span of G is 30 years longer than that of P and 10 years longer than that of S.
S could be any value.
INSUFFICIENT.
Statements 1 and 2 combined:
From statement 1:
G : S = 5:4.
From statement 2:
G is 10 greater than S.
Thus, G=50 and S=40.
SUFFICIENT.
The correct answer is
C.
Private tutor exclusively for the GMAT and GRE, with over 20 years of experience.
Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.
As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.
For more information, please email me (Mitch Hunt) at
[email protected].
Student Review #1
Student Review #2
Student Review #3
