Answer: 455 possible outcomes
Explanation:
If there are 3 positions and 15 candidates, you multiply 15 by 14, then by 13 to get the number of possible outcomes times 6.
This is because once a candidate gets a position, there will be 1 less candidate without a position each time.
15 * 14 * 13 = 2,730
Now, since there are only 3 positions, the first position has 3 possible ways, the second position has 2 possible ways, and the third position has 1 possible way.
3 * 2 * 1 = 6
2,730 / 6 = 455