Young and Slow
A to H are persons compared according to their age and speed at which they finish a certain job. A is older than B and faster than C. D is younger than E, older than C, and slower than F. G is older than H, younger than C, slower than H, and faster than F. H is older than A and slower than C. Which of the following is the most valid conclusion?
1) D is the eldest and slowest
2) G is older than E and slower than A
3) C is younger than D and faster than H
4) H is older than B and faster than A
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Ordering A to H based on provided information, from oldest to youngest (left-to-right) :
E > D > C , C > G > H , H > A , A > B
... and from highest speed to lowest (left-to-right) :
A > C , C > H , H > G > F , F > D
This way we can clearly see that 3) is the only valid conclusion.