00:03
All right, we're asked how many permutations are there of the letters of the word computer? first thing to note, we have one, two, three, four, five, six, seven, eight letters.
00:14
The second thing is to make sure that they're all distinct letters.
00:17
They are all different letters.
00:19
If i had a double r or something like that, then we'd have to divide out the number of repeats.
00:24
But in this one, they gave us kind of nice because they're all individual letters, so we can just figure out our permutations.
00:30
All right.
00:31
So we have eight letters and we're figuring out permutations of, well, all eight of them.
00:37
All right.
00:39
For this one, really, it's the same thing as eight factorial because how many ways could i fill in that first blank? eight, i have eight letters that i could start with.
00:48
How many for the second? well, once i put one of them in the first spot, i only have seven left.
00:52
And then six for the next spot...