I really need helps please !!

210

Step-by-step explanation:

We are arranging the first 3 horses that finishes out of 7 horses.

It's represented as 7P3; P- permutation [ arrangements]

7P3= 7!/ (7-3)!

= 7!/ 4!

= 7* 6* 5* 4! / 4! = 210

There are 8 horses, the number of ways that first 3 finishers turn out is permutation with n = 8, k = 3.

N  = 8P3 = 8!/(8 - 3)! = 8 x 7 x 6 = 336 ways

=> Option D is correct

Hope this helps!

:)

11 feet 6 inches and 8 feet 6 inches