Hi AbeNeedsAnswers,
We're given a group of 5 values: K, N, 12, 6, 17. We're asked for the value of N. We can answer this question by TESTing VALUES.
1) K < N
IF...
K =1, N=2, then the answer to the question is 2.
K =2, N=3, then the answer to the question is 3.
Fact 1 is INSUFFICIENT
2) The median of the numbers in the list is 10.
The 'median' of a group of 5 numbers will be the '3rd' number (when we put the numbers in order from least to greatest). Here though, we have two variables. Since three of the values (6, 12 and 17) are NOT 10, one of the two variables MUST be 10.
With 6, 10, 12 and 17, the last value would have to be 10 or less.
IF.... N=10, then K would be something LESS than or equal to 10
IF.... K=10, then N would be something LESS than or equal to 10
Fact 2 is INSUFFICIENT
Combined, we know:
K < N
K or N (or both) = 10 and 10 is the MEDIAN.
Since N is BIGGER than K, then N MUST be 10 and K MUST be less than 10.
Combined, SUFFICIENT.
Final Answer: C
GMAT assassins aren't born, they're made,
Rich
