You can, for example never foretell what any one man will do, but you can say with precision what an average number will be up to!
Target question: Is (m - r) > (s - n)?For the integers m,n,r, and s, if m + n = 250 and m > n, is (m - r) > (s - n)?
1) 250 > r + s
2) m + r + s = 375
This is a great candidate for rephrasing the target question. We have a free video on this: https://www.gmatprepnow.com/module/gmat- ... cy?id=1100
If we take the inequality in the target question and add r and n to both sides, we get . . .
REPHRASED target question: Is (m + n) > (s + r)?
Since m + n = 250, we can also rephrase it this way . . .
REPHRASED target question: Is 250 > (s + r)?
Given Information: m + n = 250 and m > n
If m and n were EQUAL, then m and n would both equal 125
Since m is GREATER THAN n, we can conclude that m > 125
Statement 1: 250 > r + s
Perfect!
One of our REPHRASED target questions is Is 250 > (s + r)?
Since statement 1 allows us to answer the REPHRASED target question with certainty, it is SUFFICIENT
Statement 2: m + r + s = 375
Earlier (in the Given Information part of the solution), we determined that m > 125
So, we can reword statement 2 as: (a number bigger than 125) + (r + s) = 375
This means that (r + s) must be LESS THAN 250
In other words, 250 > (s + r)
One of our REPHRASED target questions is Is 250 > (s + r)?
Since statement 2 allows us to answer the REPHRASED target question with certainty, it is SUFFICIENT
Answer = D
Cheers,
Brent
