Answer:
Andy > Beth > Dale > Tri > Ella
Step-by-step explanation:
Let the time taken by Beth to complete the race = x seconds,
Andy finished 4 seconds before Beth,
⇒ Time taken by Andy = (x -4) seconds,
Dale finished 7 seconds after Andy,
⇒ Time taken by Dale = (x-4) + 7 = (x+3) seconds,
Ella finished 6 seconds after Dale.
⇒ Time taken by Ella = (x+3) + 6 = (x+9) seconds,
Tri finished 3 seconds before Ella,
⇒ Time taken by Tri = (x+9) - 3 = (x+6) seconds,
Since, x - 4 < x < x + 3 < x + 6 < x + 9
Thus, the increasing order of time taken by them,
Andy < Beth < Dale < Tri < Ella,
The one who takes less time is the winner,
Hence, the order of finishing the race is,
Andy > Beth > Dale > Tri > Ella