If r, s, and t are all positive, what is the ratio of r to s to t?
(1) r - s = 2s and (t - 2s)2 = 0
(2) r = 6 and t = 8s-1
(1) r - s = 2s and (t - 2s)2 = 0
(2) r = 6 and t = 8s-1
I assume it would be (t - 2s)²Fab79 wrote:If r, s, and t are all positive, what is the ratio of r to s to t?
(1) r - s = 2s and (t - 2s)2 = 0
(2) r = 6 and t = 8s-1
Statement 1: r - s = 2s ---> r = 3s
(t - 2s)² = 0 ---> (t - 2s) = 0 ---> t = 2s
So, the required ratio = r:s:t = 3s:s:2s = 3:1:2
Sufficient
Statement 2: From the given information we cannot uniquely determine the ratio of r to s to t.
For example, consider the following two cases,
- r = 6, s = 1, t = 7 ---> r:s:t = 6:1:7
r = 6, s = 2, t = 15 ---> r:s:t = 6:2:15
The correct answer is A.
