Answer:
1814400
Step-by-step explanation:
This is a permutation. It means 10 objects taken 8 at a time. Order of the objects matters in permutations.
The formula for permutations
n P r = n ! / ( n − r ) ! ! means factorial
where n is the number of items and r is the number of objects taken together
10P8 = 10! / (10-8) !
= 10! / 2!
=1814400
