00:01
In this question, we're given a certain college.
00:03
There are students in the 15 -member advanced comms design class.
00:08
They're submitting a project for competition and must select a four -member team to attend.
00:13
Now, the team must have a team leader, a main presenter.
00:18
So these two positions are distinct and you can tell them apart.
00:22
And the other two members that have no particular defined roles, that means you can't tell them apart once they are slaughtered into this position of members.
00:34
We want to find a number of ways this team can be formed.
00:39
So take note for the team leader and presenter.
00:42
They are selected without replacement.
00:50
Now, because after you select them, you can slot them into two distinct positions, that means you can tell them apart.
00:57
The order of selection is important.
01:01
Without replacement, an order is important.
01:03
We'll be using permutation.
01:05
There's npr, which is n factorial over n minus r factorial...