00:02
Okay.
00:04
So for this particular problem, we're given digits to choose from certain digits are 45, 6, 7, 8, and 9, and those only.
00:13
And so our task is to figure out what three -digit number without repeating any of those digits or integers, that's less than 500.
00:28
So how many possibilities are there? so if you think about it, we have one.
00:33
Two, three positions.
00:36
So in that lead digit, our only option has to be four.
00:51
And that's because five is clearly not going to work if the number has to be less than five.
00:58
So we have one possibility right here.
01:05
Now if we move on to the second position right here, we have a little bit more to work with...
