kwah wrote:Attached is a question from GMAT Prep Test #2.
What is the most efficient way of achieving the result?
Answer: C
Thanks,
K
Let us assume that number of shares = S and number of bonds = B
(1) Over the time period, the ratio of the number of shares of stock to the total number of shares of stocks and bonds in Ruth's portfolio increased implies S : (S + B) increased but this does not imply for sure if the number of shares of stock in Ruth's portfolio increased, it could be due decrease also; NOT sufficient.
(2) Over the time period, the total number of shares of stocks and bonds in Ruth's portfolio increased implies S + B increased but again this does not imply for sure if the number of shares of stock in Ruth's portfolio increased; NOT sufficient.
Combining (1) and (2), S + B increased and S : (S + B) increased, which is possible only if S is also increased; SUFFICIENT.
The correct answer is
C.
