Answer:
1 in 120 or 0.83%
Explanation:
There are 5 possible winners to be called first, 4 possible winners are then left to be called second, 3 to be called third, 2 to be called fourth and the final winner is left to be called last. Therefore, the number of possible ways to arrange the winners is:
There is only one possible order for which the winners are called in order by the age from youngest to oldest. Therefore, the probability of this happening is 1 in 120 or 0.83%.