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Rocco's Race

Age 7 to 11 Short
Challenge Level

Rocco running.
Rocco ran in a 200 m race for his class.

If one more person had finished before him there would have been as many people in front of him as behind him.
But, if there had been one more person finishing after him it would have meant there were three times as many behind as in front of him.

How many runners were there in the race and what was Rocco's finishing position?