00:02
All right, so what we're doing here is we're going to find the probability of a given b.
00:08
And what that means is, or how we do it, is we're going to find the probability of a intersect b, which is the probability that both of them happen, and then we're going to divide it by the probability of b.
00:21
All right, so what that means in this case is that it's really actually a lot simpler if we just look at the table.
00:28
Right.
00:29
So when we are given a table, we can look at it and say, okay, the probability that's a student is a female, given that it's a junior.
00:35
So what we have to do is given that it's a junior, is just go to the junior's column, right? there's two and then six.
00:41
So that means that there's eight total.
00:43
So i'm going to come back over here and i'm going to say, okay, the probability that they're a junior, there's eight juniors, right? that's what i'm looking for when i'm looking at that junior's column.
00:51
So i'm just going to put in, okay, there's eight juniors...