00:01
So in this problem, we have eight people who are available, and we want to know how many ways can we have selections if we have three.
00:10
And the key is they have to be different jobs.
00:14
So this would make this a permutation.
00:17
And one thing you could do is just put these little slots down and say, okay, here's the first job.
00:22
How many different people can have that job? and there are eight.
00:25
And then here's the second job.
00:27
And how many different people can have that? well, now one person's already assigned.
00:30
So now they're only seven available.
00:33
And now this third job, how many people are available? and they're six...