00:01
For this question we're supposed to choose a president, a vice president and a secretary from a class of 15 students.
00:08
So we have 15 students total and we're filling in the posts of president, vice president and secretary.
00:18
Now to fill in the post here for president, we have 15 choices because we have 15 students in the class.
00:25
Now once you fill in the post for the president, now when you go to fill in the post for the vice president, president, you only have 14 options because one guy has been elected as the president.
00:37
After choosing the president and the vice president, you have 13 students left in the class and you're supposed to pick one secretary.
00:45
So now you have 13 choices here to pick a secretary.
00:50
So if you see, you have 15 choices for the president.
00:53
Let me just highlight it...