BTGModeratorVI wrote: ↑Fri Feb 28, 2020 9:55 am
How many numbers do the sets S and T have in common?
(1) S is a set of 10 numbers.
(2) T is a set of 100 numbers.
Answer:
E
Source: Official Guide
Target question: How many numbers do the sets S and T in common?
Statements 1 and 2 combined
There are several scenarios that satisfy BOTH statements. Here are two:
Case a: S = {1,1,1,1,1,1,..1,1} and T = {0,0,0,0,0.....,0,0,0,0,0}. In this case, the answer to the target question is
sets S and T have 0 numbers in common
Case b: S = {1,1,1,1,1,1,..1,1} and T = {1,0,0,0,0.....,0,0,0,0,0}. In this case, the answer to the target question is
sets S and T have 1 number in common
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
