00:01
Okay, this i want to evaluate.
00:03
The top is 12 times 11 times 10 times 9, 8, 7, 6, 5, 4, 3, 2, 1, all times together.
00:17
The bottom is 4 times 3 times 2 times 1 and times 8 times 7, 6, 5, 4, 3, 2 times 1.
00:32
So i can see that all of this and all of this will cancel out.
00:41
So i'm left then with 12 times 11 times 10 times 9 over 4 times 3 times 2 times 1.
00:51
So divide by 3 here, divide by 3 here.
00:58
Divide by 2 here and divide by 2 here.
01:03
Divide by 4 here and here.
01:07
And we get three...