A horse race has 13 entries and one person owns 5 of those horses. Assuming that there are no ties, what is the probability that those five horses finish first, second, third, fourth and fifth?

0.000777

Step-by-step explanation:

The number of possibilities that the 5 horses can finish in the first 5 spots is given by the permutation of those five horses in the first five positions:

The number of possible outcomes for the first 5 places is given by the permutation of 13 horses in the first five positions:

The probability that those five horses finish first, second, third, fourth and fifth is:

b is the final answer! : )